Cellular data
My phone needs an update to use cellular data when my phone has the latest update
iPhone XR, iOS 15
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Best reply
See these Apple articles below:
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)
Contact your carrier.
