DX3301-T0 firmware upgrade error

aleks9989

Hello,
during the DX3301-T0 firmware upgrade I'm facing the following error:

"Image uploading failed. You may press 'Cancel' to upload another firmware image file, or press 'OK' to reboot to recover normal operation."

My current firmware version: V5.50(ACEF.0)b2_20220715
The FW version on site: DX3301-T0_V5.50(ABVY.3.1)C0

Downloaded from here: https://download.zyxel.com/DX3301-T0/firmware/DX3301-T0_5.50(ABVY.3.1)C0.zip

Tried to upload the .bin file from the archive unzipped.

Help, please!

aleks9989

Facing the same issue! Would somebody help?

tonygibbs16

Hi @aleks9989

Welcome to the forum.

Unfortunately, the upgrade is not working for you because the letters are different (ACEF versus ABVY).

This means that your router is running ISP customised firmware, so the standard firmware will not load over it.

You probably need to ask your ISP for newer firmware.

If that is not possible, then you would need to open up your router and reflash it using JTAG I think.

Kind regards,

Tony

aleks9989

https://community.zyxel.com/en/discussion/comment/49341#Comment_49341

Hi Tony,

Thank you so much for an answer!

It is exactly mine situation - I got this router from ISP, but I have moved to another country and can't get any firmware from the ISP cause of it.
So, I would try to reflags it with JTAG as you adviced, but I am not fluent in it, so if you would take me to some link or forum with instruction I will be much obligated🙏🙏🙏

B.r.

Aleks

tonygibbs16

Hi Aleks @aleks9989

I don't work for Zyxel.

You might have to use JTAG to be able to do what you wish to do, following methods like those at https://www.hwupgrade.it/forum/showthread.php?t=2941571 and  https://www.hwupgrade.it/forum/showthread.php?t=2941741 and https://openwrt.org/inbox/toh/zyxel/zyxel_vmg8825-t50 and https://forum.archive.openwrt.org/viewtopic.php?id=47364&p=1#p246561 and https://forum.kitz.co.uk/index.php?topic=13939.30

You will need to open the case in order to do this approach, and I have not found anyone who has do it on this model of Zyxel device.

At your own risk.

Kind regards,
    Tony