[aedon]

+1 on hardwear..

Just like the other guy here ses, just take it in to the sprint store.

I had an issue with my phone, the battery drained one day to the point that it would no longer hold charge.
It would boot loop because it had zero charge and upon plug would charge for 2 seconds, then turn itself on, and die becasue it didnt have enough power to keep start up enough to keep charging.

I went to a sprint store and told them that my battery stoped charging and they took my phone to the back room and brought it back a few minutes later with a new battery.

They didnt charge me for it either. I got my phone off ebay and had a custom rom on it so I in no way had a warenty on my phone.

Either way, best bet is to take it to the store and have them swap it out.