What are some key characteristics that distinguish third-generation cellular systems from second-generation cellular systems?

Elaborate the difference between third-generation cellular systems from second-generation cellular systems?
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"Voice quality comparable to the public switched telephone network; 144 kbps data rate available to users in high-speed motor vehicles over large areas; 384 kbps available to pedestrians standing or moving slowly over small areas; Support (to be phased in) for 2.048 Mbps for office use; Symmetrical and asymmetrical data transmission rates; Support for both packet switched and circuit switched data services; An adaptive interface to the Internet to reflect efficiently the common asymmetry between inbound and outbound traffic; More efficient use of the available spectrum in general; Support for a wide variety of mobile equipment; Flexibility to allow the introduction of new services and technologies."
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"Earlier 3rd generation, there is really ii.5G. The visible difference between 2G and a pair of.5G have been in the connection as well as the bandwith rate. 2G can be of any more slowly data transfer rate and runs on the telephone dial-up interconnection while 2.5G is usually an ""generally-on"" hitting the ground with increased rates of speed. This generally implies that the link is already lively thus bandwith is actually swifter.That intended quite a lot fat loss individuals are verifying their particular emails traveling. "
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