updater and microcode

[vistad]

Hi guys, I have a problem: bought a BT headset from China, but it does not pair to my Galaxy S6. But it pairs to a computer and Galaxy S4 Micro. How to diagnose it? I should master BT domain. I am Linux Mint user. How to find microcode for my noname device? What updater to use? I've just installed bluez-tools, but bt-audio command is not found... Please advise! Thanks a lot!