IIRC, it essentially boils down to:
- closed source software running on the LTE modem,
- proprietary firmware for the Realtek bluetooth/WiFi chip
- optional firmware for camera autofocus.
- closed source software running on the LTE modem,
- proprietary firmware for the Realtek bluetooth/WiFi chip
- optional firmware for camera autofocus.
- firmware in the touch controller
No closed source drivers in the kernel or userspace though.