Default Settings.apk and Bluetooth Headphone not working

Hi everyone,

I just bought a bluetooth Sol Republic Air Tracks headphone. It works great with my smartphone but i can't make it to work with KFTV.

I sideload settings.apk that i got from searching google and found it here: https://coderwall.com/p/uzviqa

Opening settings.apk i can find and connect my bluetooth phone and it works for a few seconds with a lot of LAG and then it stops working and goes mute. I can disconnect it and reconnect and the same thing happens again.

Maybe i got an old settings.apk and that's why it doesn't work? If so, where can i download the settings.apk that everyone mentions in other threads?

Maybe it's my bluetooth headphone?

Thanks to everyone who can help me.

EDIT: Found this thread with a link to settings.apk and seems to be the same one that i got (same file size). http://forum.xda-developers.com/show....php?t=2714494
So i guess the issue is with my headphone? Anyone had issues with bluetooth headphones? Read somewhere about using a bluetooth receiver, maybe i will try that. Altough the author said it was a receiver that came with the phone, so i don't know about using a generic one...