Mobile Telephone System (AMTS), Improved Mobile Telephone Service (IMTS), and Push to
0G network allows for much greater penetration intensity.
2G technologies enabled the various mobile phone networks to provide the services such as text
messages, picture messages and MMS (multi media messages). 2G technology is more efficient.
2G technology holds sufficient security for both the sender and the receiver. All text messages
are digitally encrypted. This digital encryption allows for the transfer of data in such a way that
only the intended receiver can receive and read it.
Is the voice clarity and reduces noise in the line. Digital signals are considered environment
friendly. The use of digital data service assists mobile network operators to introduce short
message service over the cellular phones. Digital encryption has provided secrecy and safety to
the data and voice calls. The use of 2G technology requires strong digital signals to help mobile
phones work. If there is no network coverage in any specific area, digital signals would be weak.
3G technologies make use of TDMA and CDMA. 3G (Thrid Generation Technology)
technologies make use of value added services like mobile television, GPS (global positioning
system) and video conferencing. The basic feature of 3G Technology (Thrid Generation
Technology) is fast data transfer rates. However this feature is not currently working properly
because, ITU 200 is still making decision to fix the data rates. It is expected that 2mbit/sec for
stationary users, while 348kbits when moving or traveling. ITU sell various frequency rates in
order to make use of broadband technologies. Network authentication has won the trust of users,
because the user can rely on its network as a reliable source of transferring data.3G technology is
much flexible, because it is able to support the 5 major radio technologies. These radio
technologies operate under CDMA, TDMA and FDMA.CDMA holds for IMT-DS (direct
spread), IMT-MC (multi carrier). TDMA accounts for IMT-TC (time code), IMT-SC (single
carrier). FDMA has only one radio interface known as IMT-FC or frequency code. Third
generation technology is really affordable due to the agreement of industry. This agreement took
pace in order to increase its adoption by the users. 3G (Thrid Generation Technology) system is
compatible to work with the 2G technologies. 3G (Thrid Generation Technology)technologies
holds the vision that they should be expandable on demand.
When talking about 4G, question comes to our mind is what is 4G Technology. 4G is short for
Fourth (4th) Generation Technology. 4G Technology is basically the extension in the 3G
technology with more bandwidth and services offers in the 3G. But at this time nobody exactly
knows the true 4G definition. Some people say that 4G technology is the future technologies that
are mostly in their maturity period. The expectation for the 4G technology is basically the high
quality audio/video streaming over end to end Internet Protocol. If the Internet Protocol (IP)
multimedia sub-system movement achieves what it going to do, nothing of this possibly will
matter. WiMAX or mobile structural design will become progressively more translucent, and
therefore the acceptance of several architectures by a particular network operator ever more