When I bought My Tab 2 3100, it was running 4.1.1. I got hm110 bluetooth mono headset as an offer. It was working perfectly fine for listening to music too. But after few minor upgrades, i can use my bluetooth headset only to make calls and not for listening to music.
when i use play via bluetooth option on music player, it doesn't discover my device. i have tried another bluetooth too but still not getting recognized.
both works well on my old nokia mobile.