This video covers how to update the firmware of your Bittboy and pocketgo! This same method works for the LDK, rs-97 and the rg300.
Good news is that the latest firmware improves the screen tearing issues by at least 80%. In the end of the video I did a fast comparison between the LDK, pocketgo (post fix) and the bittboy (pre fix), in slow-motion and the results are very pleasing!
Pocketgo V1.3: https://mega.nz/#!YkhTjIpQ!DwrhnZImN7hpqXk1FKMXbYYyVwWN8AiOzAeFLex7f2Q
Bittboy V2 V2.5: https://mega.nz/#!IkoRHKKY!hCsSmSvLFArO59gU_5LeSz655xu-TJYBe0CDhvQu1_g
Bittboy V3: https://mega.nz/#!R04zGIZT!35PY35LDh-RvuIM-iJ16SeVEbs2AdnMoRk3-wXDIItQ
Bittboy V3.5: https://mega.nz/#!h0RVTABQ!SFPkogkERNX0w7yiYmkjfuOyPwLk2QheW-fvdA_fzpE
Tools you need to download:
Minitool partition wizard: