Upgrade the modem firmware

The following instructions are directed towards terminal and professional users.

Do it at your own risk!

Symptoms:

If you check the modem log with journalctl ( -k = --dmesg, -g = --grep, ArchWiki, man page ):

$ journalctl -k -g modem

In the kernel log, this warning shows:

[...] modem-power serial1-0: Your modem has an outdated firmware. Latest know version is EG25GGBR07A08M2G_01.002.07. Consider updating.

Solution:

To upgrade the firmware, you need to clone this repository:

[~] $ git clone https://github.com/Biktorgj/quectel_eg25_recovery

After done, change to the directory and run this command and patiently wait:

[~/quectel_eg25_recovery] $ sudo ./qfirehose -f ./

It is recommended to disable sleep mode, or plug the device into the charger while upgrading the firmware! If the phone enters deep sleep you might ended up with a bricked modem.

When the upgrade process is done, the modem will reboot automatically. The boot up process will take around 30-60 seconds.

You can confirm if it has fully booted by checking lsusb (a part of usbutils package), the modem should be:

Bus 003 Device 002: ID 2c7c:0125 Quectel Wireless Solutions Co., Ltd. EC25 LTE modem

After done, reboot the device to make sure the OS modem driver applies new configuration.

---

You can also find the firmware release notes in that repo, which are pdf files in English and Simplified Chinese.