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What are the two main differences between GPRS and UMTS

What are the two main differences between GPRS and UMTS
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mc87
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mc87
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bill30Commented:
GPRS
Cellular providers can offer packet-based services such as Internet access, text and multimedia messaging and email support over existing GSM networks with the general packet radio system. GPRS is a 2.5G (generation) cellular technology that is slower than current 3G and upcoming 4G technologies. GPRS connections are always on and do not require reconnection in order to function.

UMTS
The Universal Mobile Telecommunication System offers faster speeds than GPRS because it is a third-generation wireless system that relies on broadband technology. This wireless technology supports pictures, graphics and video communications and works in conjunction with code division multiple access (CDMA) radio technology. UMTS supports data transfer rates of up to 2 Mbps.

Basically GPRS is the upgrade to GSM or EDGE cell networks.  UMTS is based on CDMA which route their calls over several frequencies at one time, while TDMA/GPRS/GSM all use a single fixed channel for each call.
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bill30Commented:
Also GPRS allows data and voice at the same time, while UMTS/CDMA can only do data or voice.
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