It says there is no service
So it says that an update is required to use cellular data on this iPhone
iPhone 13 Pro Max, iOS 15
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qussai96 Said:
"It says there is no service: So it says that an update is required to use cellular data on this iPhone"
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Troubleshooting iPhone with "No Service":
A. Getting Around this Error:
- Go Here: If you can't Activate your iPhone - Apple Support
- As it Reads: "If your iPhone can't be activated or an alert says the activation server is unavailable or the SIM card is unsupported, learn what to do."
B. "No SIM":
"No SIM"*** is shown on the top-left corner of your screen. So, go here to fix that: If you See 'invalid SIM' or 'no SIM' on your iPhone or iPad - Apple Support
C. Whom to Contact:
Contact your Carrier, as their are the one who provide you with the service of configuring the SIM card: