Hi, everyone. I am currently using iOS12 beta 2 and somehow my cellular did not work anymore. "An update is required to use cellular data on this iPhone" poped up in the cellular page. I've checked the "Learn More" page to see the solution but it did not work. On the top of the screen, there is a triangle alerting mark with "No Service" next to it.
This issue starts a few days ago. At first, I can restart my iPhone to get cellular data work again, but the next day, it rarely worked. I tried to fix the problem by reinstalling the system. The cellular data works for few minutes after restoring my system, and then failed again.
I am looking forward to your help. Thanks a lot.
