This is part of my work reconfiguring the service. No worries, you may just disregard this message. Also, if it's okay with you, would you please try to follow this steps:

1. Turn off Wifi, turn on airplane mode and do not disturb
2. Remove and re-install sim
3. Wait for two minutes then turn on WiFI, Turn off Airplane Mode and do not disturb
4. Reset Network: Go to Settings > General > Transfer or Reset [Device] > Reset > Reset Network Settings.
5. Restart the device