i broke my old iPhone 6 Plus and took out old SIM card into a replacement iPhone 7 and after restoring from iTunes backup I noticed in my settings a list of devices and the old iPhone 6 was in that list so I deleted it and after that I could. No longer makes calls and have problems restoring and tells me failure to update cellular no service . What’s the deal?
If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad ...
Remove your SIM card from the SIM card tray and then put the SIM card back. ... Make sure that the SIM tray closes completely and isn't loose. If you use a SIM tray from a different model iPhone, iPad, or from another phone manufacturer, it might not fit properly.
If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad ...
Learn what to do if you see a SIM not supported alert.
The link on top of this page, under the "Related Article” is the process. If that link did not help then please mention the exact difficulty faced by you.
iPhone 7 A1160 no service cellular failed to update
