Several features of Windows Phone are organized into “hubs”, which combine local and on-line content by way of Windows Phone’s integration with in style social networks such as Facebook, Windows Live, and Twitter. From the hub, users can immediately comment and ‘like’ on social network updates. The other built-in hubs are Xbox Music and Video, Xbox Live Games, Windows Phone Store, and Microsoft Office. Windows Phone 8.1 was announced on April 2, 2014, after being launched in preview kind to developers on April 10, 2014. Starting with this launch, Microsoft dropped the requirement that every one Windows Phone OEMs embody a digicam button and bodily buttons for back, Start, and Search.