A friend of mine informed me that function activated over the past hours, and I just got mine up and running after receiving a call from her (who got it from another friend, and so on). So as you are suspecting, the "invite" or, more accurately, the trigger that enables the feature has to be the reception of a call from someone who already has it. Once that happens, WhatsApp's UI switches (either immediately or after you exit and reopen the app) from just showing chats, to a 3-tab layout with calls, chats, and contacts.Calls are well integrated in WhatsApp. The dedicated tab shows incoming, outgoing, and missed calls with precise timing. Ongoing calls stay in the notification panel until you hang up while missed calls leave a notification that you can later check out. While on a call, you can activate the loudspeaker or mute the microphone. If you open your text chats with any contact, a call button appears in the action bar, right next to the attach icon and the menu, to make it easier to talk to them. And finally, if you click a contact's avatar, you now get a bigger profile image with the options to message or call them, or view their information.
The call button for all contacts now defaults to a WhatsApp call instead of going through your phone. I can't find a way to trigger a regular network call from the app, which is a bit annoying because you might be in a spotty area or your contact might be offline. You'll have to go to your regular Phone app to initiate a network call.
When you're lucky enough to receive a WhatsApp call from a friend, you can go on enabling the feature by calling your other contacts. If they're running an older version of the app that doesn't support it, you will instantly see a message notifying you of that so you can tell them to update their app before you call them.
Here I have attached my Screenshots.
PS : If you want to get "Invited" you can leave comment or you can Contact me on Facebook or Whatsapp (+91-9601023924)
