1) Unplug the power supply of your Fire TV Stick/ Fire TV Box, then plug it back in.
2) Hold down the Home button (The button that looks like a house/arrow symbol) for up to 60 seconds, you may have to try it several times. Then it will be paired with your device.
3) If it is failed, you may have to unplug the Fire TV Stick/Fire TV Box several times to pair it, but it should work fine, all remotes have been tested.
4) If for some reason you can't get it to work after many tries, please feel free to contact us.