Why bother with the 635 on Sprint when you can get it a lot cheaper or even free on other carriers with much better coverage and pricing? I got a 635 GoPhone on the Black Friday deal for $39.95 and use it on H2O's $30 per month plan. The GoPhone versions work on any AT&T MVNO without unlocking and if you don't like one you can just get a new sim and switch to another. There are also a ton of MVNOs on TMobile, or even TM itself that offer phones for less and inexpensive service. Seriously, what's the appeal of Sprint?