I updated the iPhone to the latest version, but the cellular connection does not work, writes "To use cellular data on this iPhone, it needs to be updated", before that everything was fine. The iPhone began to slow down very much, it freezes by itself, restarts. iPhone version IOS 15.4.1
iPhone 7, iOS 15
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
If you still don't have a 'service' after that, see -> iPhone 7 Repair Program for "No Service" Issues
iPhone 7 Repair Program for "No Service" Issues - Apple Support
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
If you still don't have a 'service' after that, see -> iPhone 7 Repair Program for "No Service" Issues
iPhone 7 Repair Program for "No Service" Issues - Apple Support
the problem with the network on the iPhone
