Why is Bluetooth not working properly on Lenovo Vibe K5 Note?

When i conect bluetooth headset of any compny it's cannot conect phone audio

Bluetooth paired completly but cannot able to use phone audio 

Have you tried pairing the headset with other phone just to check if it is working? When you connect your phone with the headset open Settings > Bluetooth. Tap the settings beside the Bluetooth headset and enable the profiles. Let me know if that works.

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