iPhone 5 Dropping calls

I got my iphone 5 in Sept 2013, which was close to the update of iOS 7. I have completed every update since. Ever since I switched to iphone 5, I've had cutting out and dropped calls. It's extremely annoying because it does it on EVERY call. I've had Verizon for many many years and have never had this problem with them or with any other phone. I owned an iphone 4 before this one and it worked great. I called Verizon and they had me reset the phone (which I do every week anyway), then she had me add the new towers by resetting the network setting. None of the things I was told to do have worked. And I know it's their job, but the techs talk to you like you are completely ignorant. Is this a software problem? If so, do we have to wait until September to get this problem fixed or will we have another update before iOS 8? If it isn't a software problem, then how do I fix this???? Please help!!!!