My phone is not Receiving service, and I got a message That says An update is required to use cellular data on this iPhone
iPhone 13, iOS 15
Question marked as
Try first to optimize the range of the mobile network, see this Apple article:
If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad - Apple Support
See the following Apple articles:
If you see an Update Failed or Apple Pay Not Available alert after iOS update or restart
Manually update your carrier settings on your iPhone or iPad
Manually update your carrier settings on your iPhone or iPad - Apple Support