7130e Dropped Calls

Good afternoon,

I have tried searching but have not found a answer to my problem.
here goes:

I have a 7130e on the sprint network running the (CDMA) v4.2.1.110 (Platform 2.3.0.24) OS system. When i make a phone call it gets dropped 10 sec into the call. I just got the phone 4 weeks ago and it worked fine until Sunday, now I have these problems with it. I have not added any software or made any changes. My BB just sits with the 1X (with full signal Bars) on the screen even when I'm in the office where I have had a perfect reception since I got the phone.

Can anybody give me an idea why I'm haveing this problem.

Thanks!

Have you installed any new apps ?

Nope, I have no changed a thing. Can this problem be related in anyway to a bad battery?