1 g

The first generation of cell phone (1 g) refers to the simulation of mobile phones, is Hong Kong such as the United States in the nineties of the 20th century, film and television works in mobile. America is the first to develop mobile MOTOROLA, Dr. Cooper. Due to the time of the battery capacity limit and analog modulation technology requires large antenna and the development of integrated circuit and so on, this kind of mobile phone appearance square, can only become the mobile is not portable. Many people call this kind of mobile phone or "bricks" pcba  kingbox, etc.

The phone has a variety of formats, such as the NMT, AMPS, TACS, but basically only voice communication with a frequency division multiplexing, the unstable results, and lack of privacy, wireless bandwidth utilization. In the mobile phone is similar to the simple duplex radio station, on the phone is locked in a certain frequency, so the use of FM radio calls can be tapped.

2 g

The second generation of mobile phones (2 g) is the most common. Usually these phones use PHS, GSM or CDMA these very mature standard, has the stable quality and proper standby time. In order to meet the requirement of data communication in the second generation, some intermediate standard also on a mobile phone to get support, such as GPRS support MMS business and Internet business of WAP services, as well as a variety of Java program and so on.

3 g

3 g is the abbreviation of English 3 rdgeneration, refers to the third generation mobile communication technology. Relative to the first generation of simulation system, cell phone (1 g) and the second generation of GSM, TDMA digital mobile phone (2 g), the third generation mobile phone generally speaking, refers to the wireless communication and the Internet and other multimedia communication combination of a new generation of mobile communication system. It can handle images, music, video streaming and other forms of media, including web browsing, telephone meetings, e-commerce, and other information services. In order to provide the services, the wireless network must be able to support different data transmission speed, that is to say, in indoor, outdoor, and traffic environment can support at least 2 MBPS respectively (megabytes per second), 384 KBPS (kilobytes per second) and the transmission speed of 144 KBPS.

The future mobile phones

Future phones will 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 data business, more and more multimedia function was introduced to come in, the phone will have stronger operation ability, become personal information terminal, not only has the function of calls and text messages.

Mobile phone will be more intelligent, miniaturization, security, more functional.