We were with AT&T in the Bay Area, and when we moved down to the desert, we experienced a lot of dropped calls. We switched to Sprint, and had good service from 2000 to 2008. Wifey decided she wanted me to have an iPhone, so I switched back to AT&T after assurances from them that service in our area was much improved. It was better, but not great. I usually have a strong signal here at home, but 2 blocks away, nothing.
My contract is up in July, and I really don't know what I'm going to do then. I like my iPhone, but really much preferred Sprint.
Sprint has some killer devices coming out pretty soon, keep your eyes open. The HTC Evo will rival the iPhone and best it in many ways!
If you get your new Sprint service and phone from an independent cellular shop they'll probably buy your old one if you ask.
We have a good independent shop in my neighborhood. They handle all providers, sell new and used phones, and know their stuff.
I'll see about doing that... Big thing is I want to keep my number. It ends in 1337, I've had it since the mid-late 90s, and you can't get that number anymore these days because everyone in every exchange in every area code has already snatched it, haha.