That's not GSM's fault... In the Bay Area, Verizon is one big muddy overloaded mess, especially in places like Berkeley. You don't get busy signals, but you can't hear the other person either. EVRC was lousy to begin with, add the loss of spectrum to EVDO and natural network growth = nonexistent voice quality. Never had a problem on Cingular 850 (the AT&T network). The T-Mobile 1900 (ex-Cingular) network is pretty lousy, but still better than Sprint, IMO.