[numpad0]

> The LTE modem on the PinePhone is a ‘black box’, and runs its own Linux system internally.

First mention of Linux I’ve seen wrt modem firmware. Interesting!

[tmzt]

The EG25 has two cores like most Android devices. One is running Qualcomm AMSS and the other a Linux kernel. The Linux side apparently converts AT into QMI messages, and provides endpoints for NMEA and other protocols.

It also uses an android bootloader and partition layout, and can support adb connections.

https://osmocom.org/projects/quectel-modems/wiki/EC25