There are many reasons for this issue to come up. The very first reason can be the unavailability of the new video calling feature in the region of your specific person. You have to install latest WhatsApp using an APK file.
The 2nd reason adding to this issue can be that your friend is either using a phone that doesn’t support video/voice calling or that simply doesn’t have a front camera on it.
If the problem is coming up because of the 2nd reason, then your friend has to get a compatible phone.
The 3rd reason can be that your friend is not using the latest version of WhatsApp with this feature enabled.
If the issue is coming up because of the third reason, then your friend has to install the latest version of WhatsApp with video calling added in it.
Still you have problem means, Just touch with Admin Edit: Sharing Personal Details are not allowed if required use private message function this number. We will give a solution for Motorola Service Center in Chennai
— modified on Jan 30, 2017 11:17:46 AM