I just switched over from Sprint to Verizon on June 1. I got an Iphone 6 and a LG Exalt. I am extremely disatisfied with the service I am getting on both phones. They are constantly going to voice mail without ever ringing. Is it possible to terninate my contract without charges at this time? I would like just to go back to Sprint. I thought their service was bad but Verizon is worse.