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3G mobile phone is a term used to describe the third generation of mobile phones. These mobile phones are the ones that are an innovation on the early 2.5G mobile phones. These mobile phones were based on the International Telecommunication Union (ITU) family of standards that come under the IMT-2000.

A 3G mobile phone enables the various network operators to offer a wider range of some really advanced services. The 3G mobile phone also helps the services to achieve a greater network capacity by the way of some improved spectral efficiency.

The 3G mobile phone has various new services like wireless voice telephony over a wider area, video calling and also the use of broadband wireless internet now possible in a mobile environment with the help of a 3G mobile phone. There also are some additional features like, HSPA data transmission which can go up to the speeds of 14.4 Megabit per second on the downlink and 5.8 Megabit per second on the uplink.

Unlike the early IEEE 802.11 mobile phone that sued the Wi-Fi or WLAN network, a 3G mobile phone runs on a wider-area cellular telephone network which also incorporates the high-speed Internet access and a service like video telephony. The 3G mobile phone runs on a network which is a long range network with a much higher-bandwidth that has been primarily developed for data transfer.

The 3G mobile phone offers a much greater degree of security than its 2G predecessors. It allows the UE to authenticate the network it is attached to, the 3G mobile phone user can be really sure that the network is the right one and not a fraud network. Every 3G mobile phone has a network that uses the KASUMI block crypto instead of the much older A5/1 stream cipher.