1. Place all the downloaded files on the Desktop of your PC.
2. Extract files from the Fastboot package using any file extraction software to your Desktop.
3. Turn OFF your smartphone using the Power button.
4. Press and hold Volume DOWN+Power buttons together to enter into the bootloader mode.
5. Choose the Fastboot option from the bootloader menu.
6. While your phone is in the bootloader mode, connect it to your PC using the USB cable.
7. On your PC, hold the Shift button and right-click on any empty area on the Desktop and choose Open command window here.
8. Type the following commands into the Command Prompt window:
fastboot flash recovery openrecovery-twrp-2.1.7-evita.img
fastboot reboot
9. After the recovery is successfully installed on your phone, it will reboot.
Well done ! You have successfully installed the Touch Based TWRP 2.1 Recovery on your AT&T and Rogers HTC One X .