Install Magisk / root your phone

You need to extract your boot.img first (see other page) 
 
 install magisk app (make tripple sure to pick the right one ... bad people out there ...) 
 copy boot.img on your device 
 open app, hit install 
 selekt your boot.img 
 you wont finde the patched img on your PC due to RW permissions, i suggest you to share the file via DataExplorer via an messenger/encrypted e-mail) 
 reboot to bootloader 
 flash patched boot img 
 
 fastboot flash boot PATCHED_BOOT.IMG
 
 
 reboot 
 Open magist app 
 done