Well this is what I have. Incoming calls from a land line go straight to VM, cell calls seem to get through most of the time. This started right after I tried the wifi calling. I turned it off (not sure on the reprovisioning side though). Still having the same problem. Also seem to have a degrade in my LTE signal. Use to hang around -102 to -107. Now it runs -112 to -115 and I am seeing a lot more 3G. Is it possible to downgrade iOS version?