Skype for Windows Phone Beta, launched on Monday, comes with features such as free audio and video calls to other Skype users over 3G, 4G or Wi-Fi, as well as the ability to call landlines or mobile phones for a fee. Group chats and one-to-one instant messaging are also available. Skype has already been made available on Android, iOS and Symbian. It took Microsoft\'s $8.5bn (£5.2bn) acquisition of Skype to bring the service to Microsoft\'s own mobile operating system. In addition to Windows Phone, Microsoft plans to integrate Skype into its many other platforms. Skype for Windows Phone Beta is only available on Windows Phone 7.5 (Mango). Microsoft hopes to release the \'gold\' version of the software in April. From : ZDnet