I have same issue. I have a Samsung Galaxy S7 I bought from Verizon, I switched to another carrier that didn't work out, then switched back to Verizon 5 days later. I went to Verizon store & 3 hrs later with Customer Support got it working. I used it twice, then got the same problem and have it ever since. I called Customer Support and they were going to do everything they did with the store all over again. Waiting for some magic to occur!!