Updating your iPhone to the latest version of iOS 12 could cut off your cellular data and disable Internet connectivity.
According to Forbes, iOS 12.1.2 , which was released to fix cellular connectivity issue for users in Turkey, ironically introduced the same problem in other countries.
In the official release note for iOS 12.1.2, Apple says the update “addresses an issue that could affect cellular connectivity in Turkey for iPhone XR, iPhone XS, and iPhone XS Max”.
Many users have taken to Twitter to complain about the issue, with some even claiming that their smartphones have been bricked.
In various Twitter replies, Apple’s support desk recommends users to check if their phones are showing “No Service” or “Searching” at the top the screen, and if it does, users are recommended to either restart the phone or check if mobile data is enabled.