AntonelloADM , Feb 21, 2020 : Step 1: On your phone, download the Magisk installer zip (File Credit: topjohnwu). If you are not already in the TWRP recovery, hold the power button and until the reboot options menu appears on the right side. Click Recovery. Step 2: Enter your PIN/Password/Pattern if requested. You should now see a screen with grey boxes. Choose Install and navigate to the folder you downloaded the Magisk file to. Select the Magisk file (likely named Magisk-20.3.zip) and swipe the bar at the bottom to the right. Once the button appears in the bottom right, click Reboot.