To install the Flashable ZIP version, follow these instructions:
download and save the desired recovery zip file on SD card (internal or external)
start the phone in recovery mode (you can use even stock one)
to be sure that no shutdown occur during flash, please restart to recovery itself by a soft "reboot to recovery" (ignore if you are flashing from stock recovery)
go to install funcion and select on the SD card the previously saved zip file
Flash the zip file
In few seconds the flash will be complete
by selecting the right function Reboot the phone to recovery
check the new recovery and enjoy it!!
