After updating my Sony Xperia X Android 7.0, so not all functions via Bluetooth in the car when I lussnar on Spotify. What does not work anymore is changing songs and information about the current song on the radio in the car. This worked before with Android version 6.x After the phone call with the Sony support they think the problem lies in the Spotify app version 184.108.40.2060 that is not designed for Android 7.0 Play music, adjust the volume and call functions as usual.
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