My dh and I have iPhones. We are spoiled with them.

Up until this past weekend, we didn't activate the texting feature but now....I can text. ROFL! We bought my son a Samsung Flight phone. It's really nice. We didn't have the Internet service turned on so right now he can only call or text but the phone is blue tooth and internet capable.
I can't say that we aren't happy with the iphone but I'm not saying that we won't look at other Smart phones when the time comes to renew, either. The Android X is pretty nice.
We have ATT service and there's some definite very low, almost "dead" spots in certain areas around here. When I asked about it, the sales rep said that they sent an email out notifying customers of the possible slowdown for the next couple of months because they were working hard to bring the whole area up to 3G service. I said "HHHMMMM.... that email must have gotten lost in mid air because I never received it.
It really depends on the time of day here, I think. Late last night I was using both of our phones and the Internet was working super fast.