Help for rooting phone for collecting CDM L3 key

[yawoo]

I'm new to root my Android phone for collecting CDM L3 key. The bootloader has been unlocked, and I have flashed the Magisk.zip in recovery mode. Sorry that I have not carefully read the instructions. At first, I could not find Magisk app in Android phone after bootup, and thought that Magisk had not been flashed well enough. I have tried to flash the uninstalled.zip once to try to uninstall Magisk. Eventually, I have flashed another SuperSU to the Android phone for root purpose, and it can be rooted now.

My target to collect CDM L3 key, but it is found that the Android phone is still in CDM L1 after checked in DRM info. As my understand, it should be changed from L1 to L3 after unlocked bootloader in general. Furthermore, I have installed Magisk app in Android phone, but UI show that it have not installed yet.

Should I uninstall SuperSU (including unroot) first, and re-flash Magisk.zip again to correct CDM level? Any suggestion? Thanks.

My Android version is 7.1.1. CDM version is 1.0 and OEMCrypto is 11 for information.

[codehound]

use the search, ffs !!

https://forum.videohelp.com/threads/404994-Decryption-and-the-Temple-of-Doom