I switched from att to Verizon and I am unable to receive calls sparatically. I have been on with technical support multiple time without a permanent fix. When someone calls it will go straight to voicemail, then the person will message me and I am able to call them right back. If I restart the phone the issue corrects itself for a bit. I have factory reset the device, im not in airplane mode or do not disturb. I have even bought a brand new phone and this keeps happening. It is really frustrating that this can not be fixed and not knowing if I am missing any important calls. Anyone experience this?