While support already implemented came from Nokia on top of Windows Phone 8, Microsoft is now ensuring every handset running Windows Phone 8.1, which is capable of Bluetooth 4.0 LE, will be supported. Those who backed Microsoft's mobile platform have patiently waited for updates to arrive, which would enable companies like Fitbit to release official apps and provide reason for consumers to switch to Windows Phone.

Source: Bluetooth SIG, via: WMPU