said by en102 
:AT&T's 3G network drops a lot of calls, and I wouldn't recommend it for voice until they deploy more spectrum.
5MHz (10 MHz paired) is deployed in most areas on 3G
35MHz or more is deployed on GSM/EDGE.
If it was data only, I wouldn't care, but dropped calls are horrible.
Dropped calls on the 3G network are WAY to common. Yesterday, 3/5 calls I made were dropped. AT&T's great customer service told me it was a bad phone, while Apple told me to go get a new sim. 2.1 did nothing for me in the dropped call area! 
·
·
·
·