iPhone 13 Pro Max cellular data isn't working
My phone is not working
[Re-Titled by Moderator]
iPhone 13 Pro Max, iOS 15
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See these Apple articles below:
If you see No Service or Searching on your iPhone or iPad
If you see No Service or Searching on your iPhone or iPad - Apple Support
Manually update your carrier settings on your iPhone or iPad
Manually update your carrier settings on your iPhone or iPad - Apple Support
Update your network provider settings manually on your iPhone or iPad
Update your network provider settings manually on your iPhone or iPad – Apple Support (UK)
If your carrier confirms that there's no issue with your account or network, but you still can't connect to a cellular network, contact Apple Support.