Black-Berry's messenger service is being updated to allow users to make voice calls over Wi-Fi networks. Research In Motion says the latest version of its popular BBM service allows users to talk and text at the same time through a split screen feature. That would allow, for example, a user to send a picture through BlackBerry messenger while talking. Long distance calls would not incur traditional telephone charges as they would be made over a Wi-Fi Internet connection and not through the phone service provider.
