No need to do FCC sneaking anymore, as Nokia has officially confirmed that with Nokia Black update entire Lumia WP8 range will be upgraded to Bluetooth 4.0 specification. So, it seems this Bluetooth Low Energy update will again be Lumia specific.
Bluetooth LE allows you to connect your phone with special accessories like heart rate monitors. While doing that, thanks to Bluetooth LE connection, the accessory battery will last much longer, up to months.
It is already available for 520, 620, 625, and 720 with Amber. With Lumia Black software update, Bluetooth LE will be enabled across the full WP8 Lumia range.
Thanks Salvatore for the Tip. Cheers!!