Currently I am a AT&T customer with an older Nokia phone (about 2years old). I live in Northern Cal (Bay Area) and have been pretty happy with AT&T except for one thing. The reception when I am home is almost nothing. I was thinking about switching to AT&T's GSM service hoping that would improve it but I was told that I should think about switching to T-Mobile. Looking at T-Mobile there look like they have decent plans and I was looking at the Motorola V300 that should be out soon or the Nokia 6610. If I go to AT&T GSM it will probably be the Nokia 6200.

Anyone have opinions on AT&T vs. T-Mobile for the Bay Area? Also, are the phones I mentioned the way to go? Thanks in advance!!