Why my sim not working?
Why my SIM card is not working for this phone?
iPhone 12 Pro Max
Why my SIM card is not working for this phone?
iPhone 12 Pro Max
Is your phone locked to a carrier different than the one provisioned to the SIM?
Have a look at these articles -
If you see No Service or Searching on your iPhone or iPad - Apple Support
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support
Is your phone locked to a carrier different than the one provisioned to the SIM?
Have a look at these articles -
If you see No Service or Searching on your iPhone or iPad - Apple Support
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support
What is the exact error message you're seeing?
Why my sim not working?