Get the latest ADB/Fastboot drivers from Android Developers .
If you want a pre-rooted experience, you can find Android 9.0 ROMs on TeamAndroid . Download android90 root
Open Magisk, tap , choose "Select and Patch a File," and select your boot.img . Get the latest ADB/Fastboot drivers from Android Developers
Banking apps, Google Pay, and Netflix may stop working or require additional "hiding" steps. choose "Select and Patch a File
Using the wrong firmware or boot.img can permanently disable (brick) your phone.