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Currently the most widely used mobile phone world of so-called second generation mobile (2G), is based on the principle of GSM and CDMA. They are all digital formats, in addition to voice communication but can also send and receive and SMS (Short Message Service, SMS), MMS (multimedia messaging, multimedia messaging), the Wireless Application Protocol (WAP) and so on. In the People’s Republic of China and Taiwan for the most popular GSM, CDMA and PHS is (PHS) mobile also very popular. Currently, the industry is the third generation mobile migration process (3G).

Some mobile phone in most typical feature phone keypad, it also includes PDAs, game consoles, MP3, camera, photography, sound recording, GPS, Internet access and more features, it is the PDA with the trends of t mobile phone functions.
Phone orally, over the ear and the microphone, the handset is installed on a single handle. Formerly known as mobile phones, mobile phones, is portable and can in a wide range of telephone terminals to move.
Among smart  cheap mobile phones, also has a GPS system and more.

A few years ago, someone sees culture as a rich person with a cell phone. He has been fixed phones, which were so popular. Events took a new turn in the world of telecommunications. Almost everyone now uses a mobile phone. There is nothing more than a consolation. Here are just a family, where 90% of the members do not have a cell phone. Although it is not fair, they have less to which they make use of their own home as a phone.

Now the phone is very popular among ordinary people, some people even carry two cell phones simultaneously because their activity. Telephone locked life and the right message. He contributed greatly to strengthening the relationship. Now with a key, you get no trouble with whom you wish to speak. Learning to talk to old friends and new people to call is a brilliant thing. Despite these advantages, we can not refute the fact that there are limits. For example, it is probably not the owner of a series win, except the name of the person in your phone book. Sometimes you check your phone to discover that you are unidentified figures mentioned. If there is a fixed line or by phone, you can easily use search engines or sites like Yellow Pages, White Pages, etc. to present to the caller.

Others can not do with a cell phone number. The lists do not have research capabilities of cell phone numbers. But in certain situations, fixed telephony is not very effective and convenient. For example, if you’re a busy man, is your cheap cell phones always ring. Sometimes when you speak to a customer, but other customers want to connect both because of the urgent problem. If your phone can call or two and then picked up all of your customers will be satisfied. But hard power can not end a call at a time. And you can miss important calls. Thus, the cell phone in a given situation is more useful than the traditional fixed network.

At present mobile phone
Currently the most widely used in worldwide is GSM mobile phones and CDMA phones. In the Chinese mainland and Taiwan the most common is GSM, CDMA and PHS (PHS) phones are also very popular, these are the so-called second-generation mobile phone (2G), they are all digital formats, in addition to voice communication, it also send and receive SMS (short message, SMS), MMS (Technology) | MMS (MMS, MMS), Wireless application protocol (WAP) and so on.

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Mobile phone appearance generally should contain at least one LCD display and a set of keys (some with a touch screen phone with a decrease of keys). Part of the phone in addition to the typical phone features, also includes PDA, game consoles, MP3, camera, sound recording, camera, location, and more features, there are to function with a Pocket PC phone trend.
Future phone
The future will be emphasis on security and mobile data communications. On the one hand to strengthen the protection of personal privacy, on the other hand strengthen the research and development of data services, more multimedia features to be introduced in, will have a more robust mobile computing capabilities, a personal information terminal, not just with calls and text messages functions.
Phone will be more intelligent, miniaturized, security, and multiple functions.

Relative first-generation analogue phones (1G) and second-generation GSM, TDMA digital mobile phones(2G), the name of 3G communication are range, the ITU provisions of the “IMT-2000″ (International Mobile Telephone 2000) standards, European Telecommunications giants call him “UMTS” Universal Mobile Telecommunication System.

3G Mobile Phones

At present, the international 3G mobile phone (3G handsets) has three kinds of standard criteria: the European WCDMA standard, the CDMA2000 standard of the United States and TD-SCDMA standard by the Chinese scientists proposed.

dual-sim-phones

Now “3G communications,” is about to become the mantra of the mouth, so-called 3G, in fact, the full name of 3rd Generation, in Chinese meaning is the third generation digital communications. In 1995 came the first generation of digital mobile phones can only make voice calls; appeared in 1996 and 1997 the second generation digital mobile phones will increase the receive data functions, such as receiving e-mail or web page; the third generation of the main difference with the previous two generations is upgrade the voice and data transmission speed, it can handle images, music, video streaming and other forms of media services including web browsing, conference calls, e-commerce and other information services.The standard requires that mobile terminal moves to speed, the transmission data rate of 144kbps, outdoor stationary or walking speed was 384kbps, while the interior is 2Mbps. But these requirements do not mean that users can achieve 2Mbps, because the room rate will also depend on the detailed frequency planning within the building as well as organizations and carriers in close collaboration with the degree.

1G

brick-mobile-phone

The first generation of mobile phone (1G) is the analog mobile phone,that is,During 1980s to 1990s, big cellphone like a brick appear in the American and Hongkong movies.Developed the first cell phone that Motorola Inc. Dr. Cooper. As was limited by the battery capacity and analog modulation techniques require huge antennas and integrated circuit development and so restricted, this mobilephone looks boxy,square can not really be portable removable. Many people call this phone as a “brick” or King Kong and so on.
This phone has a variety of formats, such as NMT, AMPS, TACS, but basically the use of frequency division multiplexing is only for voice communications, the received signal instability, and lack of confidentiality of the wireless bandwidth is underutilized. This cell phone is similar to simple duplex radio station, the call is locked in certain frequencies, so use the FM radio can eavesdrop on calls.
2G
Second-generation cheap cell phone (2G) is the most common mobile phone. Often, these phones use the PHS, GSM or CDMA standards which are very mature, stable call quality and suitable standby time. In the second generation in order to meet the data communications needs of mobile phones on a number of intermediate standards are supported, such as support for MMS, GPRS and WAP services, Internet services, as well as a variety of Java procedures.
3G

best-cell-phone-iphone

3G, is the abbreviation of the English 3rdGeneration, the third generation mobile communication technology. Relative first-generation analogue phones (1G) and second-generation GSM, CDMA and other digital mobile phones (2G), third-generation cheap cell phones generally refers to wireless communications and Internet multimedia communication systems combined with a new generation of mobile communications. It can handle images, music, video streaming and other forms of media services including web browsing, conference calls, e-commerce and other information services. In order to provide this service, wireless network must be able to support different data transfer speed, ie indoor, outdoor, and driving environment can support at least were 2Mbps (megabits / second), 384kbps (kilobits / second) and 144kbps transmission speed.