Almost after or during every phone call the radio will shut off and restart. It will also stop me from being able to adjust the volume or stations. My phone locked up as well, so it took my phone to the store and they said the truck was the cause. I got another phone just in case and then it happened again. Then I took the truck to the dealer and they said they couldn't do anything and said if there was a problem it was probably my phone. I explained what the AT&T store said and that I got a new phone so it couldn't be the problem. They required video before they would trust me. Getting this video is very dangerous and I do not recommend anyone to attempt doing so while driving like the dealer told me to do.