So heres everything it’s crucial that you know about the issue mentioned above.
Consequently, users didnt receive phone calls and text messages due to the unavailability of mobile data.
In addition to that, some users also reported that the bug affected WiFi connections as well.
It is worth noting that the bug has affected many iPhones, but its not present on every iPhone.
These two fixes are not the exact solutions, but they might help many users.
As of now, Apple hasnt addressed the bug that disconnects iPhones from cellular data.
That said, Apple might soon release theiOS 12.1.3update which will ultimately handle this glitch.
source: www.techworm.net