Update Firmvare

Technical Subjects Open Solution
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1

Good afternoon

I am using a Quectel EC25-EU modem with firmware EC25EUGAR06A03M4G_OCPU_POSMF. When I try to enable ECM mode using the command AT+QCFG=“usbnet”,1, the command returns “OK,” but the value is not saved (it remains 0). Also, the command AT+CFUN=1,1 returns ERROR, and after reconnecting the USB, all changes are reset. In Windows, the system only detects COM ports and a USB Modem, with no network interface.

Given this, I suspect that the current POSMF firmware is blocking or ignoring usbnet changes. To make it work, I need the standard EC25-EUX Generic firmware, which supports ECM/NDIS/MBIM modes.

Please provide the official EC25-EUX Generic firmware file and instructions for flashing via QFlash.

Thank you for your help.

2

I noticed that your firmware is a openCPU solution. Such firmware is usually developed by customer to adapt custom hardware. I’d recommend to contact with device vendor to solve your issue. The generic firmware may cause booting issue because it does not match hardware.

3

Thank you for your previous reply. As you recommended, I contacted the device manufacturer.

My device is 4G USB Dongle LTE Cat4 Module EC25 with firmware EC25EUGAR06A03M4G_OCPU_POSMF.

The manufacturer confirmed that this OpenCPU firmware resets the USB network configuration after every reboot. We tested the following:

AT+QCFG=“usbnet”,1 returns OK, but after reboot usbnet always returns to 0.

AT&W does not save the setting.

Additional commands recommended by the manufacturer (AT+QCFG=“usbnet”,1,1 and AT+QCFG=“usbnet”,1,1,1) also did not solve the issue.

The modem itself works correctly (SIM detected, network registered, data attached).

The manufacturer advised me to contact Quectel again regarding a firmware update.

Could you please provide:

A firmware version that fixes this issue.

Flashing instructions and the required flashing tool.

The official Windows 11 driver package with ECM/RNDIS support.

I understand that flashing a generic firmware may not match my hardware. Could you also let me know the risk of bricking the device and recommend the correct firmware for this hardware?

Thank you for your support.

4

For default firmware, it won’t reset USB network configuration. As you mentioned, the opencpu firmware reset the USB network configuraiton. I think this is custom function developed by device vendor.

Quectel just provides original firmware and SDK. Our customer develop their own firmware based on their hardware. Original firmware cannot connect network. If you flash original firmware, your device may not working again.

Please note Quectel has not firmware of customer device.