Over 460 million of us are already consummate believers in WhatsApp’s messaging service, but the next step for the popular application is going to be voice calls.

Reports have been circulating for some time that a voice calling service was next up for WhatsApp, but recently leaked screenshots seem to confirm that this major update will be on its way to our smartphones sooner rather than later. Technology blog iPhoneItalia featured supposedly leaked screenshots of the new WhatsApp call interface for iPhone.

WhatsApp, which is currently in the process of being acquired by Facebook for $19 billion, has reportedly been working on the possibility of introducing a call feature for some time. In a statement given a few weeks ago, WhatsApp CEO Jan Koum promised an update to the long-awaited call feature by the end of 2014’s second quarter.

The product is intended to use the least amount of bandwidth possible for making calls, and should be available on iPhone and Android platforms.