My I phone 7 cellular data isn’t working

Do you see a "No Service" message? If yes -->

Click on this link 'If you can‘t make or receive calls on your iPhone' --> https://support.apple.com/HT204027

- "Find out what to do if you see "No service" or "Searching" in the status bar. You might not be able to make or receive calls on your iPhone if you have certain settings turned on, if your software isn't up to date, or if there's a problem with your network."

'If you see No Service or Searching on your iPhone or iPad' click here --> https://support.apple.com/HT201415

With an iPhone 7:

iPhone 7 Repair Program for "No Service" Issues - Certain US and Asian models

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

My phone is saying my phone does not have no service and I had service yesterday and my phone is backed up and updated