WhatsApp rolling out voice is currently the biggest instant messaging service in the world
- Whatsapp first hinted it would let users make free calls to each other early last year.
this functionality will definitely will make the Whatsapp basic app for voice calling and make other apps less popular like Viber, Line, etc..
The user further notes those who activate the WhatsApp voice calling feature in this manner – of receiving a call from someone with the feature already enabled – may not be able to use the feature to place further calls themselves.
After the first trial year, Android users need to pay an annual fee of $0.99 for the service.