From time to time if you have a Verizon phone your information needs to be updated and here are steps to update your phone:
1.Make sure your particular phone is on and have some bars for the signal, you must have some bars so the call can go through to the automated system
2.Now make sure you dial the star key (*) instead of the pound key (#) after you dial the star key then press 228 then your send key.
3.The automated system will come on and make sure you chose option two, this option updates the roaming capabilites. This basically means if your phone drop calls the *228 option 2 will update your phone with the updated tower information so dropped calls, low signal, or no signal will stop, so give this a try to stop some problems with your service.
I HOPE THIS HELPS.