No VoIP in my app using SocialPlatfomManager

I am using OvrAvatar using the latest SDK possible.
Set all the options guided in the oculus developer guide.
The Lipsync is working on the expressive avatars but not the VoIP.
I can see the remote avatar's Lipsync.

Please guide me.

I have done,
1. Added AudioSource on Local and Remote Avatar.
2. Disabled CanOwnMicrophone in the LocalAvatar.

Please suggest a way to enable VoIP.