Mobile phone, often referred as handphone in Malaysia, formerly known as cell phones or cellular phones, it is portable and can be in a wide range of mobile phone terminals.
At present, the most widely used mobile phone is GSM and CDMA mobile phone handsets. In Malaysia, GSM is most common, while CDMA and PHS (PHS) mobile phone is also very popular. These are the so-called second-generation mobile phones (2G), they are all digital standard, in addition to voice communication but also can send and receive SMS (Short Message Service, SMS), MMS (multimedia messaging, multimedia messaging), wireless application protocol (WAP) and so on.
Phone appearance generally should include at least one liquid crystal display and a set of keys (part of the use of touch-screen phone with a decrease of keys).
Some phone calls in addition to typical functions, also includes a PDA, game consoles, MP3, camera, sound recording, camera, GPS and more functions, with the phone functions to the development trend of the PDA.
Mobile phone development history
1G
The first generation of phones (1G) is the analog mobile phone, that is, in the 20th century, the United States and other 80’s and 90’s year on behalf of Hong Kong films appearing in Big Brother. Mobile developed the first U.S. company Motorola, Dr. Cooper. At that time, the battery capacity due to restrictions and the need for analog modulation huge antenna and integrated circuit development constraints, etc., this phone looks bulky, not only as a portable removable. Many people call this mobile phone for the “bricks and mortar” or KINGBOX such.
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 effect of instability in the recipient, and the lack of confidentiality, does not fully make use of wireless bandwidth. There is a simple phone-like duplex radio stations, calls are locked in a certain frequency, so the use of FM radio can eavesdrop on calls.
2G
Second-generation mobile phone is the most common. Generally, these phones use PHS, GSM or CDMA standards these are very mature, stable voice quality and suitable standby time. In the second generation in order to meet the demand for data communication, some intermediate standard is also supported mobile phones, such as support for the GPRS and MMS Internet WAP services business, as well as a wide variety of Java procedures.
3G
For third-generation mobile communication systems (3G) mobile phone has also been developed, but not universal as a result of network-related, have not been widely used. The beginning of the third generation of mobile phones is one of the objectives can be to develop a global wireless communication systems, but the actual final result is the emergence of a wide range of standard, there are WCDMA, CDMA2000 and TD-SCDMA in the competition. These new standards are based on CDMA (Code Division Multiple Access) technology, data communications bandwidth use and the further development of both.
The future of mobile phones
The future will focus on the mobile phone and data communications security. On the one hand, to strengthen the protection of privacy on the other hand, to strengthen research and development data, more multimedia features were introduced in, the phone will have more powerful computing capability, as a personal information terminal, and not just with calls and text messages functions.
Mobile phones will become more intelligent, miniaturized, security, and multifunctional.
