You may have found a forum post from 2018 with a link like http://update.huawei.com/firmware/dsl3890_v2.bin. Chances are, it leads to a 404 error. Here’s why:
Do not waste hours on dead links. If an official link is dead, the firmware is likely obsolete. dsl3890 firmware link
If your ISP’s official dsl3890 firmware link is broken, you have three options: You may have found a forum post from
Huawei does not publicly list consumer firmware for the DSL3890. However, if you have a business account, you can request the firmware via Huawei’s Technical Support portal. You will need your device’s serial number (SN) and proof of purchase. Do not waste hours on dead links
If you receive an error like "Invalid File" or "Update Failed," you are likely trying to flash the wrong region or ISP version. Double-check the Hardware Revision (H/W Ver) on the sticker on the bottom of the router; a Rev A firmware will not work on a Rev B device.
After downloading the correct file using the official DSL3890 firmware link, follow this exact sequence:
If official site is down, check: