The approval covers Bluetooth 4.0. This version of Bluetooth includes the Low Energy variant of the technology, which is used for short distance connectivity like that needed to connect a handset to a health related accessory like a heart monitor.
Windows Phone 8.1 is expected to bring virtual voice-activated personal assistant Cortana to the platform, along with separate volume controls, a quick settings menu and an enhanced notifications system.
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source: BSIG via NokiaPoweruser