i had the very same thing happen to my phone. I TOOK it to the store , they did some troubleshooting on it, they told us to send it in. That was a bad idea!! I did exactly what the tech told me to do, i sent it in. They sent me back a REFURBISHED phone back to me , and SAID IT WAS NOT DEFECTIVE, AND CHARGED ME 299.00. FOR A REFURBISHED PHONE??? I INITIALLY GOT MY ORGINAL PHONE FOR FREE, AND NOW THEY ARE BILLING ME FOR A USED PHONE. i really dont understand why this has happened. i told them later on the phone i didnt want the phone and would return it , they refused , and i have been charged on this months bill.
if yu have insurance that might be a better way to go. i did have it , but thought the phone was defective like you. I feel a little bent and they didnt help me....... they took me for 299.00.
hope yu have a better expierence 
