The BlackBerry Curve 8520 is a smartphone from the BlackBerry Curve series manufactured in Canada that was launched on August 27, 2009 and was in production until April 2012. It was BlackBerry's first

Wi-Fi calling, also called Voice over wireless LAN and VoWiFi, refers to mobile phone voice calls and data that are made over IP networks using Wi-Fi, instead of the cell towers provided by cellular n