Why can't Samsung s7 receive mobile phone information?

We have received your letter. It is recommended that you:

1. Turn off the phone, take out the SIM card, reinstall it and try to restart the phone again;

2. Replace other SIM cards and check whether the same phenomenon occurs;

3. Back up the data of the mobile phone and try to restore the mobile phone to the factory settings. If the problem still exists, it is recommended that you take the three-guarantee certificate and send your mobile phone to the nearest Samsung service center for testing. Service center:/question/1821393350815879188.html? entry = business _ qb & amphideOtherAnswer = true & ampnewAnswer= 1