- Edited
Uhmmm, there is already a problem. I thought of checking I can use internet data within the original OS before installing PA. My SIM name is reported correct (with my Samsung Galaxy on5 from the US, no name would show up at all). However, I can't get online. I checked on the APNs ,and there are a bunch from Japan, but not mine. I am unable to create a new one specific to my carrier. From the little I read this option has disappeared after Marshmallow...
Furthermore, there are many posts from people who lost internet data after updating the software, e.g., https://forums.oneplus.com/threads/not-able-to-edit-add-apn-settings-in-op3.510771/, and they are not based in Asia...
Maybe PA will give me the chance to edit APNs?!?!