I bought this phone for a family member. I did not read the forums ahead of time , but have learned that being on 4.3 is pretty crappy because you cant downgrade. i odined a root image of 4.3 found in the forums. I installed a recovery. I tried to upgrade to 4.2.2 cm11 and it failed. am i not able to install any roms on this phone at all, because of the knox 4.3 restrictions?