Note, you must have drivers properly installed and make sure your adb recognizes your phone with "fastboot devices"
1. Plug your device into PC and put it into fastboot mode!
2. If you haven't unlocked your bootloader then this will and it will entirely wipe your device!
3. After your bootloader is unlocked, phone will boot cf-autoroot, big red android icon will appear on your screen, wait for it to finish.
4. Reboot, done!