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Mobile Phone or Cell Phone Technology Details and Telemedicine

Mobile phone (Mobile Phone) Technology and Brands usable for Telemedicine

Mobile or wireless phone, usually called cellular phone, was originally just a communication tool, and it was commonly known as Big Brother in the early days. It is a portable telephone terminal that can be used in a wider range. Battlefield mobile phones manufactured by Bell Labs in 1940 were developed.

Mobile phones have great utility in telemedicine as remote patient monitoring and doctor online concepts have become prominent in healthtech and healthcare. These al use computers and mobile phones for operation.

In 1958, Soviet engineer Leonid Kupriyanovich invented the JK-1 mobile phone

In 1973, American Motorola engineer Martin Cooper invented the world's first commercial mobile phone. 

After the 2G era and the 3G era, it has developed to the 4G era so far, and the 5G era is also closely followed by domestic 5G commercial use.

    Why the cold hand will shut down?

    After a few snowfalls, the temperature in the north has continued to drop, and has even dropped to minus ten degrees. As the temperature drops, in addition to stiffening the body, many mobile phone users find that their mobile phones seem to have a "cold" and will automatically shut down whenever they move. what the hell is it?

    Why cellphones shut down in cold weather?

    The smartphone uses a lithium battery, its normal operating temperature is 0 - 40 , and the limit is -20 - 70 .
    When the battery temperature is too low, its low temperature protection will start, and the battery can not be discharged when it is charged. 

    The temperature difference between indoor and outdoor is too large, and water vapor condenses on the mobile phone and enters the mobile phone motherboard. Therefore, the phone may suddenly shut down or freeze.

    What is low temperature protection in Mobile Batteries?

    Most electronic products on the market use lithium ion polymer batteries. 
    Most lithium batteries will be equipped with low-temperature protection. 
    The larger the battery capacity, the higher the protection level. 

    When the temperature is too low, the metal lithium in the battery will deposit and no more chemical reactions will occur.

    Common Name:    Cell phone

    English Name:    Mobile Phone

    Date of invention:    In 1973

    Famous brands:    Apple, OPPO, vivo, Samsung, Huawei, Lenovo, HTC, etc.

    Chinese brands:    OPPO, vivo, ZTE, Huawei, Lenovo, Coolpad, Xiaomi, etc.

    Inventor:    Martin Cooper

    Operating system:    Android, IOS, Symbian, WP, Firefox, etc.

    Classification:    Smart phones, non-smart phones, flip phones

    Network format:    2G 3G 4G 5G

    What is the Classification of Mobile Phones?

    Mobile phones are divided into smart phones  and non-smart phones (Feature phones). 

    Generally, the performance of smart phones is better than non-smart phones, but non-smart phones are more stable than smart phones. Use the CPU of the British ARM company architecture. 

    The main frequency of the smartphone is higher, the running speed is faster, the task of the processing program is faster, and the daily life is more convenient (for example: the main frequency of the Nokia n81 has 369 MHz).
    Slow (for example: Nokia 5000 clock frequency is 50 MHz).

    Smart phone refers to an independent operating system like a personal computer, most of which are large screen machines, and touch capacitive screens, and some are resistive screens.

     Users can install programs provided by third-party service providers, including games, etc., through which the functions of mobile phones can be continuously expanded, and such mobile phones can be accessed through mobile communication networks. 

    To put it plainly, it is a simple "1 + 1 =" formula, "handheld computer + mobile phone = smart phone." Broadly speaking, a smart phone has most of the functions of a PDA in addition to the phone's calling function. 

    Especially personal information management and browser and e-mail functions based on wireless data communication. 

    Smartphones provide users with sufficient screen size and bandwidth, which is convenient for carrying around, and provides a broad stage for software operation and content services. 

    Value-added services can be launched on this, such as: stocks, news, weather, transportation, commodities, application downloads, music pictures, game downloads, etc. 

    What is the Development History of Mobile Phones?

    If we look back, we will find that the concept of mobile phones appeared as early as the 1930s. 
    At that time, Bell Labs, the largest communications company in the United States, began trial production.

     In 1930, Bell Labs created the first so-called mobile phone. However, due to its large size, researchers can only put it on the shelf of the laboratory, and people gradually forget it.

    In April 1973, the famous American Motorola engineering technician "Martin Cooper" invented the world's first mobile phone for civilian use. 

    When Cooper made the world's first mobile phone, he could use any electromagnetic frequency band. In fact, the first generation of analog mobile phones was different mobile phones with different frequencies to distinguish different users.

     The second-generation mobile phone, the GSM system, distinguishes users by extremely small time differences. Nowadays, frequency resources are obviously insufficient, and mobile phone users are rapidly increasing geometrically.

     As a result, the newer CDMA technology, which distinguishes different machines by different codes, came into being. 
    Mobile phones using this technology not only have better call quality and confidentiality, but also reduce radiation, which can be called a "green mobile phone".

    Mobile Phone Development Details

    In 1832, British Faraday discovered the phenomenon of electromagnetic induction. Maxwell further explained the research results of Faraday et al. 

    With mathematical formulas, and extended the theory of electromagnetic induction to space. More than 60 years later, Hertz confirmed the existence of electromagnetic waves in experiments. 

    The discovery of electromagnetic waves has become a turning point from "wired telecommunications" to "radio communications", and has also become the origin of the entire mobile communication. 

    As a scientist said, "Mobile phones were born on the shoulders of telegraphs and telephones. Without previous efforts, wireless communication could not be discussed.

    May 24, 1844 . Morse's telegraph sent the first telegraph of human history from Washington to Baltimore "What a miracle God has created!"

    On June 2, 1875, when Bell was experimenting, he accidentally splashed sulfuric acid on his leg. He yelled to a colleague in another room, "Live Tear, come and help me!". This sentence was transmitted to the Live Tear in another room to answer the call through the phone in the experiment. The first sentence sent.

    In 1902, an American named "Nathan Stubbfield" made the first wireless telephone device in a rural house in Murray, Kentucky. This wireless mobile phone is a human mobile phone. "The earliest exploration and research of technology.

    In 1940, Bell Laboratories of the United States manufactured a battlefield mobile phone.

    In 1946, the world made the first call from a moving car in St. Louis to make a call with a mobile phone. 

    In 1957, Leonid, an outstanding Soviet engineer. Kupriyanovich invented the JK-1 mobile phone. 

    In 1958, he has made further improvements to his mobile phone. The weight of the device has been reduced from 3 kg to 500 g (including the weight of the battery), and the shape has been reduced to the size of two cigarette boxes.
    It can be dialed anywhere in the city and can be connected to any fixed phone. 

    By the early 60s, Kupriyanovich's mobile phone was able to work effectively within a range of 200 kilometers .

    In 1958, the Soviet Union began to develop "Altai" (Алтай) , the world's first fully automatic mobile phone communication system. 

    In 1959, the "Altai" system with outstanding performance won a gold medal at the Brussels Expo.

    In 1973, a man stood on the streets of New York, took out a wireless phone about a brick, and started talking.

    Mobile Phones and Telemedicine

    As this is the era of Telemedicine hence there is need of HIPAA compliant devices or the devices that comply with HIPAA norms.

    Who is Inventor of Mobile Phone? Who is Martin Cooper?

    This person is the inventor of the mobile phone Martin Cooper. At the time he was also an engineering technician at Motorola. This was the first mobile phone in the world at that time.

    In 1975, the United States Federal Communications Commission (FCC) determined the spectrum of land mobile phone communications and high-capacity cellular mobile phones. Ready for the commercial use of mobile phones.

    In 1979, Japan opened the world's first cellular mobile phone network.

    In 1982, GSM (Mobile Communication Special Group) was established in Europe.

    In 1985, the first commercially available mobile phone in the modern sense was born. It is an example of placing the power supply and antenna in a weight of up to 3 kg.

    A mobile phone close to a modern shape was born in 1987. It still weighs about 750 grams, which is like a big brick compared to today's mobile phones that weigh only 60 grams.

    Since then, the "slimming" of mobile phones has become more and more rapid. 

    In 1991, the mobile phone weighed about 250 grams. In the autumn of 1996, a mobile phone with a volume of 100 cubic centimeters and a weight of 100 grams appeared. 

    Since then, it has been further miniaturized and lightened, and in 1999 it was lighter than 60 grams.

    Tech view of Mobile Phjone Technology

    What are the Mobile Phone Technology Development Details?

    At present, the most widely used in the world is the so-called fourth-generation mobile phone (4G), which is mainly based on the GSM standard in Europe and the CDMA standard in the United States. They are all digital. 

    In addition to voice communication, they can also send and receive text messages, Wireless application protocol, etc. 

    GSM is the most popular in Mainland China and Taiwan, and CDMA mobile phones are also very popular. The entire industry is moving to the fifth generation of mobile phones (5G). 

    In addition to the typical telephone functions, some mobile phones include a variety of functions such as PDA, game console, MP3, camera, photography, recording, GPS, Internet access, etc. 

    There is a trend towards PDA with mobile phone function. The mouthpiece, earpiece, and corresponding microphone and earpiece of the phone are all mounted on a single handle.

     Formerly known as mobile phones, mobile phones, big brothers, and faxes, it is a portable telephone terminal that can be moved in a larger range.

    Industry analysts believe that although the basic protection functions of mobile phone security products are relatively complete, they still lack in anti-harassment, privacy protection and data protection. 
    There is still a large market space in the future. QQ mobile housekeepers, security housekeepers, netqin, etc. 
    Other security vendors have announced their entry into the cloud security field. 

    2013 will be a critical year for the acceleration of mobile cloud security. Major security vendors will continue to increase their investment in mobile cloud security solutions.

    What are 1G or First Generation Mobile Phones?

    The first generation mobile phone (1G) refers to the analog mobile phone, which is the big brother that appeared in the film and television works in Hong Kong, China and the United States in the 1980s and 1990s. 

    The first to develop a mobile phone was Dr. Cooper in the United States. Due to the limitations of battery capacity at that time and the development of analog modulation technology requiring huge antennas and integrated circuits. 
    The appearance of this mobile phone was boxy and could only become mobile and not portable.

    Many people call this type of phone "brick" or black diamond.
    There are many types of mobile phones, such as NMT, AMPS, and TACS, but basically frequency division multiplexing can only be used for voice communication. 

    The reception effect is unstable, and the confidentiality is insufficient. 

    The wireless bandwidth is not fully utilized. 

    This type of mobile phone is similar to a simple radio duplex radio. The call is locked at a certain frequency, so you can eavesdrop on the call by using an adjustable frequency radio. 

    What are 2G Second Generation Mobile Phones?

    The second generation mobile phone (2G) is also the most common mobile phone. Usually these mobile phones use very mature standards such as GSM or CDMA, with stable call quality and suitable standby time. 

    In order to meet the needs of data communication in the second generation, some intermediate standards are also supported on mobile phones, such as GPRS and WAP services that support MMS services, and various Java programs.

    What are 2.5G Mobile Phones?

    Some mobile phone manufacturers call some of their mobile phones 2.5G mobile phones, which is characterized by having GPRS function.

    What are 2.75 G Mobile Phones?

    Some mobile phone manufacturers also call some of their mobile phones 2.75G mobile phones, which is characterized by faster EDGE function than GPRS.

    What are 3G Mobile Phones?

    Third Generation Mobile Phones: 3G  is the abbreviation of 3rd Generation in English, referring to the third generation mobile communication technology. 

    Compared with the first-generation analog mobile phone (1G) and the second-generation digital mobile phone (2G), the third-generation mobile phone generally refers to a new-generation mobile communication system that combines wireless communication with multimedia communication such as the Internet. 

    It can handle a variety of media forms such as images, music, and video streams, and provides a variety of information services including web browsing, teleconferencing, and e-commerce. 

    In other words, it can support at least 2Mbps (megabits per second), 384kbps (kilobits per second) and 144kbps transmission speed in indoor, outdoor and driving environments.

    ITU stipulates that 3G mobile phones are IMT-2000 (International Mobile Phone 2000) standards, and European telecom giants call them "UMTS" universal mobile communication systems.

    There are 3 standards for 3G handsets in the world: WCDMA standard in Europe, CDMA2000 standard in the US, and TD-SCDMA standard proposed by Chinese scientists.

    The so-called 3G, in fact, its full name is 3rd Generation, the Chinese meaning refers to the third generation of digital communications. 

    The first-generation digital mobile phones that came out in 1995 can only make voice calls. 

    The second-generation digital mobile phones that appeared from 1996 to 1997 have increased the function of receiving data, such as receiving e-mail or web pages.

    The third-generation and previous two-generation mobile phones 
    The main difference is the increase in the speed of transmitting sound and data. 

    Compared with the first-generation analog mobile phone (1G) and the second-generation 2G digital mobile phone, 3G communication has many names.

    ITU stipulates the "IMT-2000" (International Mobile Phone 2000) standard, and European telecom giants say It is a "UMTS" universal mobile communication system. 

    The standard stipulates that when a mobile terminal moves at a vehicle speed, its transfer data rate is 144 kbps, the rate is 384 kbps when stationary or walking outdoors, and 2 Mbps indoors. 

    However, these requirements do not mean that the user's available rate can reach 2Mbps, because the indoor rate will also depend on the detailed frequency planning in the building and the degree of cooperation between the organization and the operator.

    What are 3.5G / 3.75G Mobile Phones?

    3.5G adopts HSDPA, HSDPA +, HSDPA 2+ and HSUDA. Users can enjoy download rates from 7.2M to 42M. 

    While providing high-speed data services, security has also been improved, 3.5G mobile phones focus on security and data communications. 
    On the one hand, strengthen the protection of personal privacy, on the other hand, strengthen the research and development of data services, more multimedia functions are introduced. 
    Mobile phones have more powerful computing capabilities, no longer just personal calls and text information terminals, but more functions sexual choice. 

    Mobile office and strong demand for communication will accelerate the integration of mobile phones and personal computers, and mobile phones will gradually have the functions of personal computers. This aspect has been fully reflected in the Chinese mobile phone market.

    What are 4G Mobile Phones?

    Fourth Generation Mobile Phone: 4G is the abbreviation of the fourth generation of mobile communication and its technology, capable of transmitting high-quality video images and technical products whose image transmission quality is comparable to that of high-definition television.

    Mobile phones that have been developing

    The most widely used mobile phones in the world are GSM mobile phones and CDMA mobile phones. GSM is the most common in mainland China and Taiwan, and CDMA and PHS mobile phones are also very popular. 
    These are the so-called second-generation mobile phones (2G). They are all digital systems.
     In addition to voice communication, can send and receive text messages (short messages, SMS), MMS (technology) | MMS (MMS, multimedia SMS), wireless application protocol (WAP), etc.

    The appearance of a mobile phone should generally include at least one LCD screen and a set of keys (some phones using touch screens have fewer keys).

    In addition to the typical phone functions, some mobile phones also include more functions such as PDA, game console, MP3, camera, recording, camera and positioning. There is a trend toward Pocket PC with mobile phone function.

    What is Exterior Mobile Phone?

    As the name implies, the mobile phone type refers to the external type of the mobile phone. The more commonly used classification is to divide the mobile phone into a bar type, a folding type (single screen, dual screen), a slide type, a rotating type, a side sliding type, and the like.

    What is Clamshell Mobile Phone?

    To open the cover to see the main display or buttons, and there is only one screen, this kind of mobile phone is called a single-screen flip phone.

    There are also dual-screen clamshell phones on the market, that is, there is another secondary display on the clamshell. 
    This screen is usually not large, and can generally display functions such as time, signal, battery, and caller number.

    What is a straight type bar phone?

    A bar phone means that the phone screen and buttons are on the same plane, and the phone has no flip. This is the bar phone we often talk about. The characteristic of the upright mobile phone is that you can directly see the content displayed on the screen.

    What is sliding cover mobile phone?

    The sliding type mobile phone mainly means that the mobile phone can only see the whole body through pulling. 
    Some models can only see the keys by sliding the lower cover. While others can only see the keyboard by pulling up the screen part. 
    To some extent, the slider phone is an extension and innovation of the flip phone.

    What is a watch style mobile phone?

    In the early days, watch-type mobile phones were mostly simple and small functions, but when they reached the stage of smart phones, the functions of watch-type mobile phones were more complete, such as Samsung's Galaxy Gear V700. The earliest domestic mobile phone watch is YAMi.

    What is side sliding mobile phone?

    It is a slide-type variant that operates by pushing the screen to the left or right to reveal the keyboard. 
    For a smartphone with a large-screen touch operation, side slipping greatly speeds up typing, enhances and optimizes the experience when playing games, and makes such smartphones more popular. For example, Nokia N97 and Motorola Milestone.

    What are the Operation Methods of Mobile Phones?


    Button cell phones were the mainstream in the mobile phone market. The mobile phone has various types of buttons since its birth. 

    The earliest only medium of interaction between mobile phones and users, the importance of the keyboard is self-evident. 
    All operations such as making calls and sending text messages rely on the keyboard.

    Touch screen

    Touch screen mobile phones are the trend of the modern mobile phone market. 
    Touch screen mobile phones are divided into resistive screen and capacitive screen mobile phones, which refers to a type of mobile phone that uses touch screen technology and applies the technology to the mobile phone screen. 

    There is no obvious boundary between the classification of touch screen mobile phones and other mobile phones. 

    The biggest feature is that its large screen can provide users with visual enjoyment, and it reflects the characteristics of large screens in terms of text and images.
    However, due to the large screen, the volume is relatively large, and the space occupied by the mobile phone with a touch screen is also large. 
    At the same time, the touch screen mobile phone can be operated with fingers, which is a good substitute for the keyboard.

    What are some of the Mobile Phone operating systems?

    Android Phone Operating System

    Android is an open source mobile phone operating system based on the Linux platform announced by Google on November 5, 2007. The platform consists of an operating system, middleware, user interface and application software.

    The original meaning of the term Android refers to "robot". At the same time, Android's system architecture, like its operating system, uses a layered architecture. 

    From the architecture diagram, Android is divided into four layers, from the upper layer to the lower layer are the application layer, application framework layer, system runtime library layer and Linux kernel layer.

    Before the official release of Android, Android initially had two internal test versions, and named it after the famous robot name.
    They are: Astro Boy (Android Beta), Clockwork Robot (Android 1.0).

    Later, due to copyright issues, Google changed its naming rules to use dessert as the naming method for their system code. The dessert nomenclature began when Android 1.5 was released.

    The size of the desserts represented by each version becomes larger and larger, and then in alphabetical order of 26 letters: 
    • Cupcake (Android 1.5)
    • Donut (Android 1.6)
    • Muffin (Android 2.0 / 2.1)
    • Frozen yogurt (Android 2.2)
    • Gingerbread (Android 2.3)
    • Honeycomb (Android 3.0, Android 3.1 and Android 3.2)
    • Ice cream sandwich (Android 4.0)
    • Jelly bean (Jelly Bean, Android 4.1, Android 4.2 and Android 4.3
    • Lollipop ( Android5.0)

    Users can get a better experience through ROOT.

    Representative support manufacturers: Samsung, Xiaomi, Huawei, Meizu, ZTE, Motorola, HTC, LG, Sony.

    Apple iOS

    iOS is a closed-source operating system developed by Apple for iPhone, iPod touch and iPad. Just like the Mac OS X operating system it is based on, it is also based on Darwin. 

    Originally this system was named iPhone OS, and it was renamed to iOS at the WWDC conference on June 7, 2010. 

    The system structure of iOS is divided into four levels:
    1. The core operating system (the Core OS layer)
    2. The core service layer (the Core Services layer)
    3. The media layer (the Media layer)
    4. The Cocoa touch framework layer (the Cocoa Touch layer). Has been developed to iOS 13.
    Support manufacturer: Apple.

    Symbian Phones Operating System

    The Symbian operating system is an operating system designed by Symbian for mobile phones. It contains a joint database, user interface architecture, and reference implementation of public tools. Its predecessor is Psion’s EPOC. 

    Acquired by Nokia in December 2008, Symbian used to be the most used operating system in the mobile market, occupying most of the market share. 
    However, with Google's Android system and Apple's iPhone quickly occupying the mobile phone system market, Symbian has basically lost its position as the dominant mobile phone system. 

    There are many branches of the Symbian system, mainly the early Symbian S80, Symbian S90, Symbian UIQ, and Symbian S60 3rd, Symbian S60 5th, Symbian ^ 3, Symbian Anna, Symbian Belle, which are still in use today. 

    The Saipan system officially ended on January 24, 2013, saying goodbye to the historical stage. The last mobile phone with Symbian system is Nokia 808 pureview.

    Main support manufacturers: Nokia, Sony.

    Windows Phone Operating System

    Windows Phone is a mobile phone operating system released by Microsoft. 

    At 9:30 pm on October 11, 2010, Microsoft officially released the smartphone operating system Windows Phone, and listed Google’s Android and Apple ’s IOS as its main competitors. 

    On March 21, 2012, Windows Phone 7.5 landed in China. 

    On June 21, 2012, Microsoft officially released the latest mobile phone operating system Windows Phone 8.
    Windows Phone 8 will use the same kernel as Windows 8. Windows Phone 8 uses the same streamlined and optimized NT kernel for mobile platforms and built-in Nokia Maps.
    Users can get a better experience through jailbreaking.

    Main support manufacturers: HTC, Samsung, Nokia, Huawei.

    Firefox OS

    Firefox OS (Firefox operating system) is a mobile operating system launched by Mozilla, it is a completely open source and free mobile platform, based on HTML5 technology. 

    The biggest innovation of this system lies in HTML5. Because it fully complies with the HTML5 standard, application developers will be able to make HTML5 applications give full play to the hardware performance of the device. 

    Firefox operating system phones will use Qualcomm Snapdragon processors. Operators such as Sprint and Telefónica, as well as several mobile phone manufacturers, will support the system. 

    Telefónica will launch its first Firefox operating system device in Brazil in early 2013 under its Vivo brand. Mozilla’s other carrier partners include Deutsche Telekom, Italia Telecom, Telenor, Etisalat and Smart, while mobile phone partners include TCL and ZTE [16-17].


    MeeGo is Nokia and Intel’s announcement of a free mobile operating system, nicknamed Migou in Chinese, which can run on a variety of electronic devices such as smartphones, laptops, and TVs, and helps seamless integration of these devices. 
    This Linux-based platform is called MeeGo and combines Nokia's Maemo and Intel's Moblin platform. 

    In 2009, Nokia announced that it would abandon MeeGo and focus on the Windows Phone platform.
    Main support manufacturer: Nokia.


    The system breaks the monopoly of foreign countries in the field of basic software, leading and developing operating systems with Chinese independent intellectual property rights and Chinese characteristics.
    In addition, the operating system based on open source has many problems in security. 

    The operating system dominated by foreign companies is not satisfied. 

    The emergence of COS will solve both security and ease of use issues.

    Mobile Phone Market by Operating System

    According to the smart phone operating system classification as shown in the table below:
    Smartphone sales data (by operating system, in millions)









    Palm / WebOS

    According to the phone manufacturers

    Mobile Phone Market by Use


    Business mobile phones, as the name implies, are mobile phones that target business groups with business people or people working in state agencies. 

    Due to its powerful functions, business mobile phones are very popular. Industry experts pointed out: 
    "A good business mobile phone should help users achieve fast and smooth communication while completing business activities efficiently."


    Although the image mobile phone is a kind of mobile phone, it is mainly a mobile phone with a main image function. 

    The world's first camera phone was J-SH04 manufactured by Sharp in Japan in November 2000. Unexpectedly. This camera phone used a CMOS image sensor module (referred to as CMOS). 

    As CMOS was more power efficient than the CCD image sensor module used in digital cameras at the time.

    Let the battery of the mobile phone not be exhausted quickly because of the use of the camera.

    Learning application

    Learning mobile phone is to add learning function on the basis of mobile phone, supplemented by mobile phone, "learning" is the main; learning mobile phone is mainly used for junior high school, high school, university and international students. 

    The function must be a versatile teaching tool integrating teaching materials and practical textbooks learning, with the goal of "teaching". It has obvious auxiliary effect on learning. 
    It can be carried around and entered into the learning state at any time, which is the value it should have as a learning mobile phone.

    Phones for Old or Elderly People

    With the improvement of people's health and the extension of the lifespan of the population, the proportion of the elderly in the population is increasing. 

    Elderly groups, which account for nearly one-third of the population, need their own mobile phones. 
    Their requirements for mobile phones probably have the features of mobile phone functions that are easy to operate, large display fonts, and so on. 

    Manufacturers have followed suit to develop their own brands of elderly mobile phones.

    Practical functions: Large screen, large font, large ringtone, large keys, large call tone.

    Mobiles with Back Light used in studies

    Convenient life: Professional software (visualization, simple menu, clear and clear structure), one-touch dialing, money detector, flashlight, hearing aid, voice reading phone book, reading short messages, reading incoming calls, reading and  dialing.
    Not only that, it also has functions to improve the quality of life of the elderly:
    • External radio
    • Peking Opera
    • One-button distress (a high-decibel distress tone is issued after pressing the button
    • A distress call is sent to the designated number
    • A distress message is sent)
    • Daily Recipes (best to download and update online)
    • Grocery shopping list

    Phones for Children

    Children's mobile phones refer to mobile phone products specially designed and manufactured for children. 

    Compared with ordinary mobile phones, children's mobile phones are often designed with cartoons and customized functions. 

    It is a child-specific mobile phone specially developed for children aged 4-14 to facilitate parents to contact and monitor their children. Its design meets children's psychological habits and safety education needs. 

    The problems of excessive radiation and battery quality caused by ordinary adult mobile phones have also become the priority issues facing manufacturers. 

    Existing manufacturers have used lithium polymer battery batteries to replace traditional lithium batteries, and lowered the antenna design below the mobile phone.

    Radiation effectively improves the safety of children's mobile phones. However, it is recommended that children use mobile phones as little as possible because children are not as immune as adults.

    Stocks (Stock Trading) Phone

    Stock trading mobile phone is a mobile phone with software installed for stock trading, also known as stock trading machine, stock machine, stock trading machine. 

    The screen of the stock trading mobile phone is relatively large, which is conducive to investors to see real-time data. 

    Stockholders’ mobile phones for stocks are simple and convenient to use and easy to carry. So ordinary stockholders choose to use stocks for online trading.


    Music phones, in fact, in addition to the basic functions of the phone (calling, texting, etc.), it is more focused on music playback. It is characterized by good sound quality, long-lasting music playing time, and shortcut keys for music playing. 

    Better music phones include Sony Ericsson's WALKMAN series and Nokia XpressMusic series, and other brands are also involved in this type of mobile phone.

    TV. Mobile Phone Television

    TV (Television) Mobile Phone

    TV mobile refers to a technology or application that uses mobile phones as terminal devices to transmit TV content. There are three main ways to realize the mobile TV service:
    1. Using cellular mobile networks, such as Sprint in the United States, China Mobile and China Unicom have already launched mobile TV services in this way.
    2. Using satellite broadcasting, South Korean operators plan to use this method.
    3. It is to install the receiving module of digital TV in the mobile phone, and receive the digital TV signal directly.
    Ways to use mobile networks: The mobile TV services launched by mobile operators in the United States and China mainly rely on existing mobile networks.
    China Mobile's mobile TV business is based on its GPRS network, while China Unicom relies on its CDMA1X network. 
    This mobile TV service actually uses streaming media technology to launch mobile TV as a data service.

    Regardless of whether it is a GPRS mobile phone or a CDMA1X mobile phone, it is necessary to install the corresponding playback software on the mobile terminal (usually high-end products such as PDA mobile phones) equipped with an operating system. 
    The corresponding TV program is provided by the mobile communication company or the corresponding SP organize and provide.

    It is a very novel idea to use the satellite network to realize the method and use the mobile phone to receive the TV program signal broadcast by the satellite. 

    Only South Korea is pushing this mobile TV broadcasting method (DMB). The corresponding standards in South Korea and Japan have been determined, and such modules will be launched soon in these two places. The rest of the world will lag behind.

    Samsung, which is responsible for producing such mobile phone terminals, said that the DMB module will increase the price of mobile phones by $ 20 to $ 30. 

    The most promising mobile TV technology is through the integration of digital TV and mobile phones. In this way, the microwave digital TV receiving module needs to be installed on the mobile phone terminal, and the digital TV signal can be directly obtained without the link of the mobile communication network.
    The mobile phone digital TV standard is only the European DVB-H and Japan's single-band broadcasting standard. 

    DVB-H stands for Digital Video Broadcasting Handheld, which is the transmission standard established by the European Digital Television Standards Organization (DVB) for providing multimedia services to portable / handheld terminals via terrestrial digital broadcasting networks.

    The DVB-H standard relies on the DVB-T transmission system, by adding certain additional functions and improved technology to enable mobile devices such as mobile phones to receive broadcast and television signals stably. 

    The DVB-H standard was approved by the DVB technical seminar group. Japan has formulated the "single-band broadcasting" specification under its "ISDB-T" standard for microwave digital TV broadcasting. Although the functions of these two technical specifications are equivalent, there are still great differences between them. Single-band broadcasting divides the frequency and reduces the bandwidth, while DVB-H uses the bandwidth of time-division digital multimedia broadcasting and transmits the data of each channel in a pulse manner. 

    Under normal circumstances, in addition to receiving the data of the desired channel, the tuner circuit is turned off at other times, so it can effectively reduce power consumption.

    Game oriented Mobile Phone

    Gaming phones, that is, phones that focus more on gaming functions. The characteristic is that there are buttons specially designed for games or buttons convenient for games on the body, and the screen is generally not small. For example, Sony Ericsson Xperia Play Z1i.
    Responsive HD Movies Mobile Phones

    HD movies Mobile Phone

    High-definition movie mobile phones can meet the needs of users to enjoy high-definition movies anytime, anywhere. 

    Generally, the screen size is large and the resolution is high, mainly focusing on the user's audio-visual experience. At the same time, a large-capacity battery is needed to support long-term movie watching. 

    Many large screen mobile phones with HD resolution (1024 × 768) have appeared on the market. For example, Samsung Note2, etc.

    Ultra-thin Mobile Phone

    In the ultra-thin mobile phone Daquan iPhone 5 V version of the camera function is considered very strong. 

    iPhone 5 V supports 1080P full HD video shooting. In addition to the enhanced stability of shooting, it also adds an intelligent smile detection function, and can also take pictures at the same time when shooting, which is similar to HTC One X. 
    In addition, the Facetime function of the front camera also supports 3G networks, and the video quality of the camera used for video calls can reach 720P HD level, and also has a smile detection function. 

    Although the iPhone 5 V version camera has no change in pixel parameters, the richer and more practical function improvements still have a good performance. 
    Coupled with ingenious color matching, I want to believe that it is definitely a symbol of identity.

    Mobile Phone Tablets

    Tablet phone

    As the name suggests: a tablet that can make calls.
    Because the portability and aesthetics of the tablet computer cannot be surpassed by all notebook computers. 

    Although the traditional concept of smartphones has a computer operating system, it cannot reach the level of the computer due to its function and use. In this environment, the mobile phone tablet, a computer came into being. This tablet computer not only has all the functions of a mobile phone, but also has computer functions, becoming a veritable tablet computer that can make calls.

    Smart card mobile phone

    Smart card mobile phone is a combination of integrated encryption chip and PSAM card, which can not only realize the function of mobile phone, but also realize many business functions such as transfer and remittance, balance inquiry, credit card repayment and so on. 

    Password keyboard input, effectively prevent the unsafe hidden danger of the third-party input method, safe and reliable.

     All data in the communication are encrypted by hardware. Adopting APN card point-to-point wireless channel and PSAM card technology to ensure the security and confidentiality of user funds transfer.
    It is a high-tech product that combines smart phones and financial self-service terminals for financial business processing, users can handle it anytime, anywhere Business, convenience and flexibility can save a lot of time and effort.

    1. It is a smartphone
    2. Support banking and some convenient services
    3. The transfer payment function can be completed without online banking
    4. Support multiple banks
    5. Use of all UnionPay debit cards and credit cards
    6. Multiple encryption to ensure safety
    7. Simple and easy to operate, easy to use.

    Chinese Operator

    China is Moobile phone world leader. So lets study and understand the mobile phone market there itself.
    China Mobile
    The full name of CMCC is "China Mobile Communications Corporation", which is China Mobile Communications Corporation (referred to as "China Mobile"), established on April 20, 2000.
     It is a mobile based on GSM, TD-SCDMA and TD-LTE network Communication operator. 

    China Mobile Communications Corporation is a Chinese state-owned backbone enterprise established on the basis of the overall divestiture of China Telecom’s mobile communications assets in accordance with their country’s deployment and requirements for the reform of the telecommunications system. It was officially listed on May 16, 2000. 

    China Mobile Communications Corporation is wholly-owned by China Mobile (Hong Kong) Group Co., Ltd., and its controlled China Mobile Co., Ltd. ("listed company") establishes wholly-owned subsidiaries in 31 provinces (autonomous regions and municipalities) and the Hong Kong Special Administrative Region of China. The company, and listed in Hong Kong and New York.

    China Telecom
    China Telecom Group Corporation (referred to as "China Telecom") was established on May 17, 2000 and is a large state-owned communications company in China. 

    China Telecom, as China's main telecommunications enterprise and the largest basic network operator, has the world's largest fixed telephone network, covering the country's urban and rural areas, and reaching all parts of the world.
    Its member units include 31 provincial-level enterprises throughout the country, operating telecommunications nationwide business. 

    On March 31, 2011, China Telecom's Tianyi mobile users exceeded 100 million and became the world's largest CDMA network operator. There are two major listed companies under China Telecom Group Corporation-China Telecom Corporation Limited and China Communications Service Corporation Limited.

    In 2011, China Telecom launched the "Broadband China · Optical Network City" project.

    China Unicom
    China Unicom (China Unicom, China Unicom) is the only telecom operator in China listed in New York, Hong Kong and Shanghai at the same time. It was based on the original China Netcom and China Unicom on January 6, 2009. Formed by the merger. 

    China Unicom is a Fortune 500 company with a communications network covering the whole country and the world. It has branches in 31 provinces (autonomous regions and municipalities directly under the Central Government) and overseas countries and regions. 

    It provides business, fixed communication business, domestic and international communication facility service business, satellite international leased line business, data communication business, network access business and various telecommunication value-added services. 

    In January 2009, China Unicom obtained the WCDMA standard 3G license, and owns famous customer brands such as "Wo 3G / Wo 4G", "Wo Pai" and "Wo Family". 

    In 2013, China Unicom launched 4G equipment network construction and purchased TD-LTE base stations. On March 18, 2014, China Unicom announced the official commercial launch of 4G.

    The mobile phone is a spare baby. When you use it, you will encounter accidents or early degradation of the function, which is relatively higher than any electrical product in your home.

    If you have some basic mobile phone first-aid knowledge, first rescue before sending to the repair, you can reduce losses and save your phone's life.

    Mobile Bank

    China's mobile banking business started in 1999. As with WAP, early mobile banking has high barriers to use and poor user experience, and the bank is only satisfied with concept promotion, and has not really worked on the content, which has dampened the enthusiasm of some customers who are interested in the business.
    It makes customers have more negative impressions on mobile banking and makes the development of this business not smooth. 

    However, with the continuous improvement of information technology and the gradual change of the bank's business philosophy, the basic conditions of China's mobile banking are gradually maturing. 
    In particular, the rapid development of mobile phone terminals has greatly improved the quality of wireless networks. 
    The problems that originally restricted the development of mobile banking have been gradually solved. 

    Since 2004, mobile banking has regained the attention of various banks. Many banks, including China Construction Bank and Bank of Communications, have launched their own mobile banking systems.

    WAP Mobile Banking system architecture

    WAP has been used for mobile Internet access in Asia since the late 1990s, but it was not sought after by the market at that time. 

    The root cause was that WAP was based on dial-up mode at the time, the Internet speed was slow, and the Internet access fee was high according to the time. 
    At the same time, it lacked the support of mobile terminals. Now with the improvement of network conditions, the above obstacles restricting the development of WAP technology no longer exist. 

    Tens of millions of WAP users have been nurtured by mobile 2.5G GPRS network and China Unicom 2.75G CDMA1x network, and a huge new network application is becoming popular. 
    At the same time, as the banking industry's most concerned security issues, it was also solved with the upgrade of WAP 1.x and 2.0 mobile terminals and WAP gateways.

    Bank of Communications is seeing the maturity of WAP applications. At the same time, it has fully learned the lessons of other banks' mobile banking business, paid attention to lowering the threshold for customers, and launched mobile banking based on WAP communication.

    Bank of Communications' mobile banking system uses a three-tier architecture system, namely the access layer (client phone), business support layer (mobile banking service system), and banking business platform.

    Mobile banking customers' mobile phones use WAP access technology to interact with the mobile banking system through the gateways of their respective operators. The mobile banking system then interacts with the various business systems of the bank through the online banking gateway.

    Bank of Communications Mobile Banking can connect China Mobile and China Unicom at the same time. It has a wide geographical coverage and is applicable to many customer levels. 
    Compared with other similar products on the market, it has obvious advantages such as rich functions, convenient operation, safety and reliability, and simple application procedures. 

    At present, this mobile bank can not only provide personal financial services such as account inquiry, card-to-card transfer, credit card repayment, verbal report loss, mobile phone recharge, etc., but also can be used for fund transactions and foreign exchange treasure transactions. 

    In addition to providing foreign exchange Public information services such as trading prices, market prices, consulting, K-line chart inquiries, stock and securities inquiries, etc.

    Bank of Communications Mobile Banking Security

    In the mobile banking system of Bank of Communications, if the protocol supported by the customer's mobile phone is WAP 1.x, the WAP 1.x architecture is adopted in which the security between the mobile phone and the gateway (mobile or Unicom gateway) is controlled by WTLS (wireless transport layer Security) agreement. 

    WTLS is the security protocol of the TLS wireless version. 

    WTLS can guarantee the data integrity, confidentiality and authenticity between the mobile phone and the gateway. 
    The security between the gateway and the bank's WAP server is guaranteed by optional SSL (Secure Socket Layer) or TLS (Transport Layer Security Protocol).

    SSL guarantees data integrity, confidentiality and authenticity between the gateway and the WAP server. 
    If the protocol supported by the customer's mobile phone is WAP 2.0, then the customer's mobile phone already directly supports various Internet communication protocols. 

    The security between all mobile phones and the bank's WAP server, is directly guaranteed by the optional TLS. 
    This is transparent to the intermediate gateway (wireless IP routing). 

    TLS ensures the integrity, confidentiality and authenticity of data between the customer ’s mobile phone and the bank.

    Bank of Communications' mobile banking system supports both of the above two protocols, and provides security assurance based on this WAP security architecture. 

    When a customer conducts a business transaction, the key sensitive fields of the customer transaction are encrypted, and the inter-customer transaction is encrypted using the industry-recognized secure encryption algorithm to ensure the security of the customer transaction. 

    It is worth mentioning here that due to the lack of understanding of new technologies, people often pay special attention to the safety of mobile banking, and even keep away from such service methods as mobile banking. 

    In fact, due to the operator's encryption algorithm for encrypting wireless transmission over the air, and the key is stored in the user-side card and the network-side infrastructure equipment, and the use of multiple defensive mechanisms such as slow frequency hopping technology, if you do not resort to the infrastructure on the network side (such as MSC / VLR, HLR, etc.), it is technically very difficult to achieve the purpose of stealing wireless signal content. 

    The banking department as an application development unit will also pay enough attention to the security of mobile banking. Therefore, the current mobile banking has sufficient security guarantees from the application itself.

    What are the Problems facing mobile banking?

    Judging from the current application situation of mobile banking, the most popular among customers are foreign exchange treasure transactions that have the highest real-time requirements.

    The transactions with the largest business volume are the purchase and redemption of money market funds, and the most transactions are query transactions. 

    Mobile phone recharge transactions are highly appreciated by customers, and customers can fully feel the convenience of mobile banking when they are on a business trip or even abroad.

    Compared with online banking and telephone banking, the unique advantages of mobile banking at any time have been highlighted. However, the real advantages of mobile banking are security and identity authentication.

    In fact, a variety of technologies are used on mobile terminals and wireless networks to ensure data security, and its security is higher than online banking and mobile banking. 

    What has not yet been fully recognized by everyone is that since mobile terminals and mobile phone cards are the most private electronic appliances. 
    They have the function of identity authentication, and the customers of large-value transfer and payment transactions are resolved through the identity authentication function of mobile banking.

    The problem of identity confirmation can greatly improve the security of such businesses, reduce transaction risks, and can play an important role in promoting business development. 

    In the long run, the use of mobile phone terminals to ensure the security of the entire electronic transaction channel and customer identity authentication is technically completely achievable, and from the customer's perspective, it is also convenient and completely acceptable.

    At present, the main problem in the development of mobile banking is that the entire mobile banking transaction process involves mobile terminal manufacturers, mobile operators, banks and customers, and the entire production chain is too long. 

    At present, there are some irregularities in the support of mobile phone terminal equipment and mobile operation equipment for data services, and any incompatibility will affect the use of customers.
    Related rumors and truth

    Does Mobile Phone cause cancer?

    Myth 1: Cell phone radiation causes cancer
    Truth: There is currently no credible evidence that weak RF signals can affect human health. 

    According to current scientific understanding, this radiation will not cause harm to the human body within a reasonable range. 

    According to the safety upper limit set by the International Commission on Non-Ionizing Radiation, the safe radiation range tolerated by the human body is 10 watts per square meter.

    Do low power phone calls have higher radiation?

    Rumor two: Low-power phone calls have higher radiation
    Truth: Usually people say that the radiation intensity of a mobile phone is not related to the remaining power of the mobile phone, but is related to the signal strength of the mobile phone. 

    This rumor clearly confuses "one cell's battery power" and "cell phone's one cell signal". In the case of only one cell signal, the radiation intensity of the cell phone may indeed appear "1000 times as usual".

    Can charging and playing mobile phones cause explosion?

    Rumor three: charging and playing mobile phones will explode
    Truth: The explosion of mobile phones one after another is frightening. The culprit of the explosion is actually a low-quality mobile phone charger. So try to use the charger and battery certified by the manufacturer. 

    In addition, playing the mobile phone during the charging process will indeed increase the calorific value of the mobile phone. For safety, try not to play the mobile phone while charging.

    Can Mobile Phone Radiation Burn face or skin?

    Rumor 4: Cell phone radiation caused burns to the calling face
    Truth: According to previous test results, the maximum temperature rise caused by mobile phone radiation in the head is 0.194 degrees Celsius. 

    According to IEEE safety standards, the threshold for local temperature rise in the human body does not exceed 3.5 degrees Celsius. 

    If the normal temperature of the human body is 36.5 degrees Celsius, the local temperature cannot be higher than 40 degrees Celsius, and the highest temperature caused by the radiation of the mobile phone is less than 37 degrees Celsius, which is within a safe range. And humans can also adjust their own local temperature through their own body fluid flow. Therefore, the basis for the temperature increase caused by radiation is not sufficient.

    Although the temperature rise due to radiation is limited, it is not uncommon for the phone itself to become hot. 

    There are two main reasons why mobile phones become hot:

    1) Playing with a mobile phone for a long time causes a large load on the CPU and GPU. 
    Due to the small space of the mobile phone, the heat dissipation capacity is limited, and the battery itself also heats up, which makes the mobile phone hot, and the temperature can even reach 50 degrees, which may naturally Burn the skin.

    2) Use the RF front end for a long time, such as making a phone call. If the mobile phone signal is not good at this time, the base station will increase the power output of the mobile phone RF end through power control technology, resulting in increased local heating of the RF front end. 

    Anyone who has used a mobile phone knows that the long-time phone call will cause a high degree of heat in the phone handset, and the user will stick the phone to the skin, which makes the heat dissipation unsatisfactory and causes burns. 

    Therefore, it is recommended to use mobile phones:
    i. Try to pick up the phone in an area with good signal
    ii. Reduce talk time in areas with poor signal quality
    iii. If you call for a long time, it is best to use a wired headset to answer the call.

    In fact, the most important thing is not to call for too long.


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