The calls have returned to WhatsApp , as has been reported from XDA Developers few hours ago. A couple of weeks ago, VoIP free calls through WhatsApp appeared by surprise , but the joy did not last, as the possibility to activate them vanished shortly.
But now, for the moment, we can return to and activate, and then you explain it in simple steps :
It is important to emphasize that this method now works exclusively with that version that we downloaded from the web , ie the 2.11.552 , not with the version available on Google Play. Furthermore, it is strictly necessary pick up a call we receive, otherwise the service is not activated.