But the original GSM TDMA timeslots in the use of technology in each of the frequency range to be able to use WCDMA technology, but at the same time have used the technology of CDMA so that everyone can use the same frequency to transmit data at the same time, and to provide a faster service in the 3G era, therefore, has developed IMT-2000, which according to the standard requirements development, expand the channel bar to serve a wider, more quickly than ever.
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