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Instant messaging app WhatsApp has released an update for Windows Phone.
According to thenextweb.com, the update introduces voice calling facility and the ability to send audio files to those running Windows 8.1.
The feature has already been introduced for iOS and Android earlier this year and now Windows Phone users can finally benefit from it.
WhatsApp has more than 800 million active users.
VoIP (Voice over IP) feature of WhatsApp is now available on the three platforms. WhatsApp can focus on updating and improving the overall calling feature to make it compete with Skype and Viber.
