difference between wcdma and gsm in capacity?
Hi,
Most 3G handsets these days are dual-mode, that is, WCDMA and GSM capable. The first ones, ie the ones at 3 in Australia were only WCDMA, but the newest are all dual-mode. That means, when moving from an area of WCDMA coverage, to one without WCDMA coverage, the call will continue on the GSM network.
The biggest difference between WCDMA and CDMA2000 is the origin. WCDMA is an evolution of GSM, while CDMA2000 is an evolution of CDMA.
WCDMA uses a broader spectrum and the signalling is based on GSM. CDMA's signalling is somewhat related to TDMA signalling.
Both use Code Division to get the packets in sequence and both offer similar data speed and voice capabilities.
WCDMA handsets use an extended SIM, called a USIM (UMTS Subscriber Information Module) which contains additional WCDMA information.