Sprint. Decent Sanyo phone. Service has always been pretty good. Our billing has been screwed up on numerous occasions which I would not have noticed, but my girlfriend is far more diligent than I. I believe we share 2000 minutes, 400 or 500 text messages, free early nights, weekends, Sprint to Sprint, roaming and long distance, all for around $92 a month. I think that's with some discount through her job. Our contract is up in a couple months but it looks like the iPhone is out of our budget so we will probably renew with Sprint. I honestly don't like any of the other phones out there at this point. They all seem like the same phones I've used for the last 4 years except with more features shoehorned into the same boring UI. That and they're a little more aerodynamic, and I don't need to tell you how important that is.