I can't hear the other party's voice through the Bluetooth car sound system/headphone during a call after upgrade to Android 11. What can I do?

This article is for the Bluetooth connection problem after the Android 11 upgrade. 

Issue

We apologize for any inconvenience.  

You may be facing a problem that you can’t hear the other party’s voice through the car sound system or headphones during a call when you connect your Xperia phone to the car sound system or headphone via Bluetooth after the Android 11 upgrade. 

Workaround 

Please try to switch the phone’s sound output as follows for a while until the fixed software is released. 

1. Select the Sound checkbox on the screen of your Xperia phone during a call. 
2. Select Speaker on the sound switching screen that appears at the bottom of the screen. 
3. Select the Sound checkbox on the phone screen again. 
4. Select the car sound system or headphones connected via Bluetooth on the sound switching screen that appears at the bottom of the screen. 

Solution 

We have acknowledged this issue and are working on resolving it shortly.