How to fix SIM failure on an iPhone 13?

?

physical SIM remove it and re-insert it...

Remove or switch the SIM card in your iPhone - Apple Support

Remove or switch the SIM card in your iPhone - Apple Support

eSIM

Set up cellular service on iPhone Setup eSIM

Set up cellular service on iPhone - Apple Support

Settings>General>Transfer or Reset iPhone>Reset>Reset Network Settings <—————————RESET

If you see SOS, No Service, or Searching on your iPhone or iPad - Apple Support

Manually update your carrier settings on your iPhone or iPad

Manually update your carrier settings on your iPhone or iPad - Apple Support

Note: if you have an issue with SIM contact your Carrier