Download the correct recovery IMG for your device
Install ADB and Fastboot on your computer
Enable Developer Options on the device
Enable USB Debugging on the device
Connect the device to the computer with a USB cable
Open a command prompt or terminal in the folder with the IMG file
Verify the device is detected with `adb devices`
Reboot to bootloader with `adb reboot bootloader`
Confirm the bootloader is unlocked if required
Flash the recovery image with `fastboot flash recovery recovery.img`
If the device uses a different partition layout, use the correct partition name
Reboot directly into recovery with `fastboot boot recovery.img` if supported
Reboot the device with `fastboot reboot`
Use the hardware key combination to enter recovery if needed