Bluetooth Problem

[kosmimi]

Bluetooth seems work normal but when have call and telephone send the call to the bluetooth handsfree sometimes no hear nothing or hear and talk for few seconds in bad quality. i have the same problem in two different bluetooth handsfree (sony mbh-20 & plantronics voyager legend). with other telephone this two bluetooth handsfree work normal.

[Phy]

Check if you experience the same while on safe mode.

How to boot on safe mode
http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

How to boot on safe mode on Lolipop
1. press and hold the power key
2. once you get the pop up menu 
3. press and hold "power off" 
4. Boot on safe mode should become available

[kosmimi]

I make the check. Seems to work in safe mode. What is the next step? One by one checking those applications have access to bluetooth? ( i want to believe no have problems applications like Skype, Viber, Whatsapp). Any idea?

[kosmimi · Accepted solution]

I think i found it. In Settings -> Xperia Connectivity -> Throw settings -> Auto-select wireless option need to be closed. It was open. After i close the two bluetooth handsfree work normal. The telephone diverts the call to handsfree and work properly.

[edwardcid98]

Hi, i update to Android M, and continues the bluetooth falis with my Sony SBH50 and my old Sony MW600, i was think my MW600, had problem because i has many years, and i get the SBH50, and continues the problem, disconeting when i listen music and in a call, with my old Galaxy S4, and my MW600, not problem, Sony Really need to do everything 100% without problem, `cause they are going to loss it the position on the market.-

[Rodis11]

I have exactly the same problem, Bluetooth fails, with two Bluetooth devices, plantronics voyager and SmartWatch S3 Frontier. If anyone knows any solution, please reply. Thanks