Last night my phone stopped working with a message "network not available". this has now happened three times in as many months. I was able to use data but not my phone. This is a safety issue in that it is the only phone I have and I need it to work 24/7. I turned my phone off but it did not work again until this morning. Is there a fix for this? Doesn't Verizon have the largest network? What's up?