The Ghost in the Recovery
Once in Android System Recovery 3e, use the Volume buttons to navigate and the Power button to select:
Flash TWRP:
ADB and Fastboot
: You need these command-line tools installed on your PC to communicate with the phone in "Fastboot" or "Bootloader" mode.
3. Prerequisites
Note: On some newer devices (A/B partition slots), use:
Now, the device was ready to accept low-level commands. Elias typed: fastboot boot twrp.img