Facebook's WhatsApp adding voice calls

Whatsapp was bought by Mark Zuckerberg, the inventor of Facebook for $19 bilion.

At the Mobile World Congress in Barcelona, Whatsapp Company said that Whatsapp will adding phone calls to its list of services, and it will be free.

Nowdays, Whatsapp offers unlimited messages between users. It costs 99 cents yearly.

Voice service will start with Apple and Andoid's systems and then with Windows and Blackberry's phones.

The "new" Whatsapp has got a lot of competiton with other apps that their offer voice messages such as Skype.

http://edition.cnn.com/2014/02/24/tech/mobile/whatsapp-voice/index.html?iref=allsearch