Mike, is this issue still persisting for you? If so let us know. It's not that common but from time to time that could be cause by any one of the carriers. If it continues or happens 100% of the time let us know.
I've received a complain today that my number was not working from people in our target market: Cleveland. I'm in florida now and I called and it works, but cleveland is huge for us, we need that to go through.