I have been happy using a Sony Ericsson T616 on the AT&T network for the last 10 months or so. I bought it through Amazon.com with a 1yr contract and ended up getting the phone for free and getting $75 back. Looks like the deal now is $50 back, but still, getting a free phone and $50 back is pretty nice. Search for "T616" on Amazon and you'll see the various deals.