Strange behavior of bluetooth

[Android Question]

I have Samsung Galaxy S2 (not rooted) with Android 4.0.4

and there is a following problem with bluetooth earpiece (I tried several, from different manufacturers).

After the first call made (or received), the audio stops working. I.E. the devices stay paired and I can answer or end call via earpiece button, but the voice goes to the phone, not to the airpiece.

any suggestions?

thank you in advance.

 

[Rukbat]

Broken phone. How far are you willing to dig into it (and how much equipment do you have available to dig into it) before you want to give up and bring it in for repair?