Back side of the motherboard:

Qualcomm PM8941 power management IC

Qualcomm WTR1625L RF transceiver

DPR EAE99

0V00680-B64G-1C

Skyworks SKY85702-11 5 GHz WLAN front-end module

Qualcomm WCN3680 802.11ac combo Wi-Fi/Bluetooth/FM chip

It should be noted that the WCN3680 chipset does indeed support Bluetooth LE 4.0. Amazon has promised to enable this option in the future. Until then, any BLE devices, such as the current slate of smart watches, are incompatible with the Fire Phone.