There are several very useful mods (.zip file installs via recovery) available on the XDA Developers Forum (https://forum.xda-developers.com/). I have been able to get a few working on the X9S, but most do not install. Could someone explain why a "universal" mod install that works on most Android phones would fail to install on the Zidoo platform? I would like to find a way to adapt at least the Dolby Atmos mod (https://forum.xda-developers.com/an...olby-atmos-t3412342/post71004371#post71004371). Thanks! Fred (USA)