Well I have the worst phone imaginable, it's supposed to be designed for messaging, but it's way worse than my old cheap nokia phones that are like 5 years old. And the battery will no longer charge with it's original charger, or even hold much of a charge for the day without use.
As for AT&T service, it's a crap shoot sometimes. I can be holding the phone in my hand, with full bars, and it vibrate to tell me I have a voicemail. It happened a lot with the Samsung, not so much with my Nokia (which I have switched back to for the time being). I can't wait till the end of the year when I can get a new phone.