My iPhone 7 service is out date

If you have try to optimize the range of the mobile network, see this Apple article: If you see No Service or Searching on your iPhone or iPad

https://support.apple.com/en-us/HT201415

& the problem persists see -> iPhone 7 Repair Program for "No Service" Issues

https://support.apple.com/iphone-7-no-service

Sorry? What do you mean by that?

That statement makes no sense without context.