Need ACDJ firmware dump for Zyxel NR5103E – device flashed with wrong NR5103 generic firmware

Northrol

Hi everyone, I need help recovering a Zyxel NR5103E (Tre Sweden variant). The device was incorrectly flashed buy a buyer who claimed it didn't work and used the site to send it back to me and get his money back stating it wasn't working when he got it (well, he had it for over a week when it stopped working for him). It was flashed with the generic NR5103 firmware V4.19(ABYC.3)C0, which replaced the entire Zyxel system with a MediaTek/OpenWrt‑based image.

Symptoms:

• /etc/zyxel missing
• /etc/version missing
• No MTD partitions (/dev/mtd* absent)
• Boot partitions (/dev/mmcblk0boot0/1) are permission‑locked
• Device reports itself as “OpenWrt Generic v0”
• All Zyxel metadata wiped

This means I can’t extract the original firmware version from the device anymore. But I know it was a Tre‑branded (3, Three, Hi3GAccess) NR5103E, so it must have used ACDJ.x firmware.

I’m looking for any of the following:

• V1.00(ACDJ.1)bX
• V1.00(ACDJ.2)bX
• V1.00(ACDJ.3)bX
• Or a full dump from a working Tre NR5103E

If anyone has a Tre NR5103E and can share a firmware dump (or even just the .bin update file), it would help me recover the device through UART/u‑boot or Zyxel recovery mode.

Tre Sweden says they can't send the file and considers the unit as soft-bricked and refers back to Zyxel. They don't have this firmware on any servers apparently as it all is OTA - which makes sense, but anywa. Which it isn't. It receives 5G signals but it indicates that something is wrong (power-light shines red instead of green). I can use the internet when it is connected via cable to my computer, but not via Wi-fi - it's like the wi-fi doesnt start at all.

Thanks in advance to anyone who can help.