Bluetooth sound sharing not working after battery replacement

Hello there!

I have followed your guide, and it helped me alot! Purchased battery, replaced, on my iPhone 5s, but after replacement one strange thing is not working anymore. That is bluetooth sound sharing. Do you know what possibly could go wrong there?

DId I miss something, or forgot to plug something out correctly? To be more precise, WIFI works as expected, bluetooth pairing also, but when I call someone or get called, I dont hear any sound on my bluetooth speakers/ car bluetooth system.

Please help, I am desperate to know what could go wrong!

Best regards,

Alex.

EDIT: 1 week later: I have managed to solve issue by opening device again, cleaning connectors and putting it all together. It looks like some dust particle entered when I previously replaced battery.