Can say that my phone on the verizon network has very little issues with having service. In fact, here out west where coverage can be spotty my verizon service is often the only phone that can actually make calls, particularly when we're RVing in remote areas. T-Mobile and ATT have occasional lack of service in many smaller towns, and Sprint is nearly useless outside of major cities. We have been in both Tucson area (Kartchner Caverns) and a few days in Amarillo in the last few months, neither location posed any issues with our Verizon service. I have had friends and family having issues with dropping calls and lack of service that turned out to be phone related, maybe problem is more hardware related than network availability. Good luck, hope you find resolution quickly, these days we can hardly survive without our cell phones.