There are many iPhone users who have upgraded to iOS 12.1.2, but they are reporting a number of issues. Most users reported that their devices are being disconnected from cellular data. Just one day after the early December launch of iOS 12.1.1, which improved the FaceTime user interface and added Haptic Feedback features for the iPhone XR, Apple rolled out the iOS 12.1.2 public beta. The latest version of Apple’s mobile operating system looked to clean up a variety of bugs, including cellular connectivity issues that appeared in iOS 12.1.1.
Apple announced iOS 12.1.2 on December 17 with the upgrade to solve issues with eSIM support for the iPhone XR, XS, and XS Max. The new upgrade would fix cellular connectivity problems for users in Turkey. Apple pushed out a second build to fix unnamed issues with the first one without changing the software upgrade version number, just days after the initial build of iOS 12.1.2.
Hundreds of iPhone users have taken to Twitter, Facebook, and Reddit. They reported that the iOS 12.1.2 upgrade caused cellular data issues on their iPhones. Some users claimed that iOS 12.1.2 completely disconnected their iPhones from cellular data. They were unable to send and receive phone calls and text messages. Some users claimed that they have been unable to link up to Wi-Fi connections.
The first possible fix is to go to the iPhone’s Settings app, enter the Cellular menu, and disable Wi-Fi Calling. The second suggestion is to go to the Cellular Data Options under the same menu and change the Enable LTE field to Data Only from Voice & Data. These solutions are just temporary fixes, and they might not work for everyone. Moreover, the best way to deal with the matter should come from Apple.