It has been reported that WhatsApp will add a new voice calling function within the next few months.
Currently WhatsApp offers voice notes and small audio clips for users; however the update will mean it can act more like Skype.
The announcement was one of several made at Mobile World Congress in Barcelona on Monday - the biggest event in the mobile industry calendar.
As well as Nokia, the event also heard the latest updates from Sony, Lenovo, HP and ZTE.
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