Apart from group messaging, the update to version 2.2 will also introduce the ability to add custom backgrounds to conversations, a new HD voice engine that reportedly provides better quality calls, time stamps, photos in contact list and also the ability to see which of your friends has recently joined Viber. We’re not sure if Viber’s new feature will allow it to grab more market share from WhatsApp since it now does what WhatsApp does and more, but if you have yet to update/download the latest version of the app, head on over to the iTunes App Store or the Google Play store for the download.