Cellular error on iPhone
[Re-Titled by Moderator]
[Re-Titled by Moderator]
Visit your carrier to fix your mobile Internet.
See if anything here helps.
Activate cellular data service on your iPad Pro, iPad Air 2, and iPad mini 3 or later
iOS- Understanding cellular data networks
iPhone/iPad - No Service or Searching.
iPhone - If you can't make or receive calls
iPhone - If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad
Cellular error on iPhone