II-After powering down, press Volume Down and while pressing Volume Down, press Power holding both buttons to start the device into Bootloader mode. If you have difficulty, power up normally, go to Settings->Battery and deselect Fast boot. Power down and try again.
III-Use the Volume buttons to select up or down. Highlight Fastboot and press the Power button.
iRoot supported for Android 2.2 through 4.4 running devices and more than 150000 models with various brand names.The best free android root app in the world.You can root - unroot your device in single click.
Instructions: I- Select the correct device and build (what you are currently running) II- Configure your drivers if you haven’t already using the driver guide (If you aren’t sure use Step 3 of the driver guide to test your drivers). III- If you need to, backup your important data. IV- Unlock your device V- Root your device Thats All