An app by adota earphone test app shows that binaural isn't working properly I'm not sure about the issue whether it's due to earphone that comes in box or the dts in device.
Could be that the app isn't compatible with DTS but that doesn't mean that you can't hear binaural recordings. You may ask the developer why the app gives you this message
I have got solution for this, after I reset I don't know why the hell did mono audio get activated. You could just add this as a point in "tips and tricks thread". Btw you can close this thread.