Installing TWRP on Google Pixel 4 XL

An OTG cable and a USB required

You must have Full OEM Unlock and USB Debugging (Preferable) to be enabled in the Developer options!

The USB MUST be in FAT32, otherwise you will not be able to mount it

So, in order to make some customs to your device TWRP is a must-have thing for your phones

Go to the TWRP Site and downloader both the twrp.img and twrpinstaller.zip and put them into the platform-tools folder

adb -s <DEVICE_CODE> <Command>

using that template check devices using:

adb devices

Then reboot to bootloader or use

adb reboot bootloader

and then

fastboot boot twrp.img

A TWRP screen will appear on the device Copy the zip installer to the usb

Connect the OTG to phone and enter mount in twrp and check the storage_1

Go back and go to install. There you have to flash the install_twrp.zip so it will be persistent.

The TWRP is now installed !