How to upgrade my iPhone
How can I update my phone I can’t make any calls or text
iPhone XR, iOS 14
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See if anything here helps.
iPhone - If you can't make or receive calls
iPhone/iPad - No Service or Searching.
iPhone - If you see 'invalid SIM' or 'no SIM' on your iPhone or iPad
See the articles below.
Get help with over-the-air iOS updates -
Update – Can’t or can’t restore -
Have you tried using iTunes on a computer or Finder if running Catalina or later to do the update?
Update software on iOS devices in iTunes on Mac. -
Phone, iPad, or iPod touch - Update with Finder. *
iPhone, iPad, or iPod touch - Update with iTunes. *
If you see an error when you update or restore your iPhone, iPad, or iPod *
Updating iOS: common issues and solutions. -