@flohack Hello, Last year I had to reinstall Android for some months and I used LineageOS. This Android version allows you to run the selinux commands without the need of Magisk. It allows you to run adb shell commands as root with a simple checkbox in the developper settings. I was happy to discover this possibility with LineageOS as I had already restored my data on the phone

https://forums.ubports.com/topic/1405/please-use-general-category-for-what-it-is Kind of the answer to your question.

ignore my last reply, i got it to install. i tested it for a bit with at&t in the usa, and i found that 4g data works, sms messages do send to the person on the other end at first but on your end its just stuck loading and you cant send anything else nor receive anything else, volte calling doesnt work, it immediately fails on your end and when someone tries to call you they go straight to voicemail. location services seem to be faster than the halium 9 port, and cameraservice crashes whenever you try to record a video.