I have my unlocked AT&T Pre3 on T-Mobile right now, which means it's using strictly GSM for voice and EDGE data. I've not been too pleased with the call quality at all. The people I'm talking to sound a little 'electronic' and a bit choppy at times.

For various reasons I've been pondering a move to AT&T's network (either AT&T directly or one of the MVNO's that use AT&T), even though that means more money.

Can anyone say whether call quality is any better on AT&T? Or is this just a symptom of being on GSM? I've been on CDMA forever... do people on GSM just accept that this is how a mobile phone sounds?