Facebook continues in the line they decided a few months ago to provide VoIP calls free to its users. The first to enjoy this possibility have been the owners of iPhone, initially in the USA and Canada, although after has been deployed in several European countries. Now the turn has come for users of Android. At the moment is only available in the United States, but Facebook Messenger for Android allows free calls between users of the social network, using Wi-Fi and cellular networks 3G and 4G. From the Thursday afternoon it is deploying the call support, which does not require updating Facebook application Messenger.