When Apple introduced the iPhone 4S, they brought along the Bluetooth 4.0 LE technology. Essentially this was Bluetooth but used less energy than its predecessor, making it ideal for accessories. In fact one of the criticisms Nike had about Android devices in general is that they had yet to adopt Bluetooth 4.0 LE across the board, hence the lack of FuelBand support for the platform. Well the good news for Windows Phone owners is that as far as Nokia users are concerned, Nokia has confirmed that Bluetooth 4.0 LE will be coming to its entire Lumia lineup in an upcoming firmware update that will come with recently announced Lumia 1520.
Ubergizmo , Nokia Bringing Bluetooth 4.0 LE To Their Devices In Upcoming Lumia Black Update, Nokia Bringing Bluetooth 4.0 LE To Their Devices In Upcoming Lumia Black Update