WhatsApp Call rolling to iOS users soon: Co-founder Brian Acton
WhatsApp voice calling feature rolled out to more Android users
WhatsApp Call is being rolled out to Android users
WhatsApp's privacy settings can be hacked easily by this publicly available web tool
Exclusive: We tried WhatsApp Call and it is a winner!
WhatsApp adds new voice calling button on iPhone app ahead of 'WhatsApp Call' service launch