Mobile data issue
I have iPhone 11 Pro Max in warranty and suddenly my mobile data stops working… it happens only with mobile data .. as I will be able to make calls and receive calls .. however internet will not work ..
iPhone 11 Pro Max, iOS 15
Go through the various suggestions in the support article below but if they don't help, and your network carrier can't help, then contact Apple Support for further investigation.
Support article:
https://support.apple.com/en-us/HT201415