And since restarting my phone I now have no service at all 

Hi @MDCQ 

I’m sorry to hear this, what happens when you attempt to make a call?

Have you tried resetting your network settings?

For iPhone;

Settings > General > Transfer or Reset RDevice] > Reset > Reset Network Settings.

For most Android;

Settings > System > Reset options > Reset Wi-Fi, mobile & Bluetooth

For Samsung; 

Settings > General management > Reset > Reset mobile network settings

Resetting network settings will NOT reset any personal data (Photos, Videos, Contacts etc) only network settings.

Tom