My phone will not update therefore has no cellular data
an iPhone 7
iPhone 7
Question marked as
Go through the various suggestions in the support article below but if they don't help, and your network carrier can't help, then contact Apple Support for further investigation.
Support article: If you see No Service or Searching on your iPhone or iPad - Apple Support
In rare occasions iphone 7 can lose connectivity
iPhone 7 Repair Program for "No Service" Issues - Apple Support