Have you tried reseating the SIM card? You also might try a new SIM card, they're free at your local Corporate VzW store or by contacting Customer Service.
We want to be sure the service on your device is working the way it should ndrever. When did this issue begin? Does this happen in a specific location or anywhere you are? If it is only at a specific location, please provide the zip code so we can take a closer look at the area.
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