i got when u mention about fiio x7
but you say no phone or player outputs 24/192, i am just confused now, as i thought that i can get an output of 24/192 when i use for example chord mojo and onkyo hf player, so why does the light colour change on mojo from different file rates when i use onkyo hf player. Or do u mean just with v4a and android players
honestly i am totally confused now
both android and iOS (without a doubt windows phone too, but who uses that?) don't output anything above 320kbps. FiiO wrote a way around this, and some others might have too, but almost all android/ios/wp devices will not do anything higher than 320kbps. neither will the devices that can, if you use an app not made to work with this.