Basicaly 3G is just the Broadband of the mobile phone world. basically GSM just uses 14kbps time slots to do a phone call, however 3G can achieve upto 384Kbps, most 3G networks at the moment use a 64kbps time slot which means the same quality as a normal phone line...
Its good techonology, maybe oneday we wont need broadband, everything will be 3g with a laptop or something :ermm:
Jono