Just over a week after WhatsApp co-founder Brian Acton revealed that the voice calling feature will be made available to iOS users soon, the company’s support department has confirmed that efforts are underway to bring the feature to Windows Phone also. “WhatsApp Calling for your platform [Windows Phone] is still in the works,” the company confirmed in an email, although it refused to comment on any release timelines at the moment. initially , the whatsapp calling feature was made possible through an invite system. but just a few days ago , it was made official to all android users running the latest whatsapp release.

Really don't know why but I hardly hear the person when calling