So my phone recently stopped receiving or sending any outgoing calls. I went through all kinds of steps and reading to try and fix it. The weird thing was the data connection was still working fine. Text messages weren't coming through, but iMessages were. I even wiped the phone and restored it twice to no avail. I discovered that when I turn LTE to off or Data only, I can suddenly make calls again and it works fine. Is there something wrong with my phone? It's a 128gb iPhone 6s on iOS 9.3.2 (13F69) with Carrier AT&T 24.1 .