Back side of the motherboard:
Qualcomm PM8941 power management IC
Qualcomm WTR1625L RF transceiver
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.