Nokia Care app confirms only the NL 520, 620, 625 and 720 will get Bluetooth Low Energy support initially, but it may come eventually to all Lumias by Surur Davids News, Rumour
Adidas miCoach app supports the Bluetooth Low Energy miCoach Heart Rate Monitor by Surur Davids Accessory, News
Nokia asks the FCC for permission to upgrade the Nokia Lumia 620 to Bluetooth 4.0+LE by Surur Davids News