In February, WhatsApp CEO Jan Koum had told audience at the Mobile World Congress that that the possibility of introducing voice calls was real.
Recent screen shots of what WhatsApp's VoIP feature on an iPhone were leaked on the internet (by Italian website - PhoneItalia).
The image reveals an interface that closely resembles the updated iOS7 look.
It is now being reported that the new feature could be introduced within the next few months.
While Skype has prepaid packages starting at 0.06 US cents per minute to popular destinations including India, WhatsApp could initially introduce calls for free.
But, that's no reason for users in the UAE to rejoice.
Most VoIP services continue to be blocked in the UAE.
Meanwhile, earlier this weekend security experts revealed a major flaw in WhatsApp's security system.
The flaw allows hackers to access a WhatsApp message history on an Android phone.
Security consultant Bas Bosschert has put out a detailed log of the security flaw and said: "The WhatsApp database is saved on the SD card which can be read by any Android application if the user allows it to access the SD card.
"And since majority of the people allows everything on their Android device, this is not much of a problem."
According to them, "Every application can read the WhatsApp database and it is also possible to read the chats from the encrypted databases. Facebook didn't need to buy WhatsApp to read your chats."
WhatsApp on Tuesday released a security update on Android but the loophole still exists.
The best you can do to avoid your date being stolen is review permissions that you have given to other apps, especially apps downloaded through the third party app stores.