I just updated my phone from oreo to pie.. and my major problem now is the cellular data... Its not working... It shows the 4g and 3g sign but it isnt connected... No data connection at all.. i hope they will fix this as soon as possible... Because this is very inconvinient....
What's your phone’s firmware version (Settings > About phone> Build number)
Does this problem appear when you in other different location?
Please try to use other different sim card for a check.
Please check it in safe mode. (https://www.asus.com/support/faq/1005163)
Please help to confirm, thank you:)