Back side of the logic board:

SanDisk SDMFLBCB2 128 Gb (16 GB) NAND Flash

Murata 339S0228 Wi-Fi Module

Apple/Dialog 338S1251-AZ Power Management IC

Broadcom BCM5976 Touchscreen Controller

NXP LPC18B1UK ARM Cortex-M3 Microcontroller (also known as the M8 motion coprocessor)

NXP 65V10 NFC module + Secure Element (likely contains an NXP PN544 NFC controller inside)

Qualcomm WTR1625L RF Transceiver