Sim card error, but when i restart the phone it's fine. What do I do?

[Windows Central Question]

sim card error, but when i restart the phone it's fine

Random sim card error occurred. Phones been working fine since I bought it in July 2014. It is a Lumia 920. I tries restarting the phone and that seemed to fix it but only for a brief couple minutes before telling me again I had a sim card error.