iOS 12.1.1 can cause iPhone to lose 3G / 4G connection

After updating to iOS 12.1.1, a digital user replied on Forbes page about the status of their device could not connect to the service provider to use 3G and 4G mobile data.

Although iOS 12.1.1 fixes many bugs that arise from the previous version, this version itself has some new bugs that annoy the iPhone users. One of them is the error related to mobile data connection, specifically, after upgrading to iOS 12.1.1 using 3G, 4G on Safari browser can not access FaceTime, no open third party applications or some other online services.

Even if you tried to update your network settings or restart the device, you still can't fix the error. Therefore, if you are planning to upgrade to iOS version 12.1.1, you should be careful.

See more:

1. Causes and ways to fix iPhone does not turn on 4G
2. Cause and how to fix iPhone error to catch Wifi but not access to the network
3. Fix the error of turning on 3G data but cannot connect to the Internet on iPhone