Finally a new version of WhatsApp is released that offer you Calling feature. No invitation required. All you have to do is update your WhatsApp version to v2.12.19.'
- Download WhatsApp version to v2.12.19 apk file first.
- Copy the file in your Android Device.
- Launch WhatsApp first and then tap on Settings > Go in Chat Settings and create a Backup first.
- Then go in your Android Phone Settings > Security > Add a tick on Unknown Sources.
- Go the location where you had saved the WhatsApp apk file and tap on it for installation. Install it.
- After starting WhatsApp you might have to re-verify the number. Verify it and restore your old backup. That's it. The call tab will now appear in the chat messenger.