My iPhone has a sim card but it says no device
My phone has a sim card but it says no device and cellular update failed. the phone is fully updated
[Re-Titled by Moderator]
iPhone 7, iOS 15
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Have a look at these articles.
If you see No Service or Searching on your iPhone or iPad
https://support.apple.com/en-us/HT201415
Update your carrier settings on your iPhone or iPad
https://support.apple.com/en-us/HT201270
