How to flash TWRP Recovery on HTC One M8 for Beginners

How to Boot to Fastboot Mode

1. Power off the smartphone completely.
   – make sure that it is not connected to your PC.
2. After several seconds with the phone turned off you should press and hold Power and volume Down silmultaneously.
3. This will load the Bootloader Mode of your HTC One M8 and you can release all buttons.
   – note that this might be trickier than you would normally expect, so you should more than once in case it doesn’t work at the first attempt.
4. Use the Volume buttons to select FASTBOOT option. Press Power to boot the Fastboot Mode.

FLASHING TWRP RECOVERY

1. Open command prompt as administrator and enter the following commands one after the other.

cd /d c:\Android

fastboot flash recovery recovery.img

That's all. Recovery is flashed. You can now use the volume down button to select recovery from the fastboot mode an the press the power button to boot into recovery.