The front side of the logic board:

Apple A8 APL1011 SoC + SK Hynix RAM as denoted by the markings H9CKNNN8KTMRWR-NTH (we presume it is 1 GB LPDDR3 RAM, the same as in the iPhone 6 Plus)

Qualcomm MDM9625M LTE Modem

Skyworks 77802-23 Low Band LTE PAD

Avago A8020 High Band PAD

Avago A8010 Ultra High Band PA + FBARs

Skyworks 77803-20 Mid Band LTE PAD

InvenSense MP67B 6-axis Gyroscope and Accelerometer Combo