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As of 2025, many ISPs are phasing out the DSL3890 in favor of newer Wi-Fi 6 models (e.g., Huawei AX3 or Fritz!Box 7590). If your ISP no longer lists a dsl3890 firmware link on their official site, the device is likely End-of-Life (EOL).

At that point, you have two choices:

⚠️ Note: Firmware links are region-specific. Always use the version for your hardware revision (e.g., A1, B1) and region.

Official D-Link Support Portal:
👉 https://support.dlink.com
→ Search for "DSL-3890"
→ Select your Hardware Version (printed on device label)
→ Download the latest .bin or .zip firmware file.

Direct example format (not real-time link):
https://support.dlink.com/resource/products/DSL-3890/DSL-3890_fw_v1.02.bin

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.

Here is the critical fact that most users miss: The Huawei DSL3890 is almost always a white-label device provided by Internet Service Providers (ISPs). This means the "stock" Huawei firmware rarely works.

For example:

Each ISP customizes the firmware with their own connection certificates, VoIP settings, and UI branding. Using the wrong firmware will brick your router.

The D-Link DSL-3890 (often branded as the AC2400 Wireless VDSL2/ADSL2+ Modem Router) is a high-performance device used by many Internet Service Providers (ISPs). Updating the firmware can improve Wi-Fi stability, fix security vulnerabilities, and resolve connectivity drop-outs.

However, sourcing the firmware for this specific model can be tricky due to ISP customization.

After verifying current sources as of this writing, the most reliable DSL3890 firmware link is found through D-Link’s official support portal. However, D-Link uses region-specific domains (e.g., dlink.com, dlink.co.uk, dlink.com.au). Here is the master strategy:

Direct Access Method:

If the official link is down or slow, D-Link also mirrors firmware on their FTP legacy site (use with caution, verify file hashes). The legacy path is often: ftp://ftp.dlink.com/DSL/DSL-3890/Firmware/

Warning: Do not click on third-party "driver download" websites that pop up when searching "dsl3890 firmware link". These are often malware traps. Only trust dlink.com domains.

The story begins with the hardware itself. To the untrained eye, the D-Link DSL-3890 looks like just another retail router. It bears the familiar black-and-silver aesthetic of D-Link, a giant in the networking world.

However, if a user buys this router on the second-hand market or receives it from a specific Internet Service Provider (ISP), they will quickly encounter a confusing reality when they visit the official D-Link support website.

They type "DSL-3890" into the search bar, hit enter, and... nothing. Or, they find a page that refuses to show a "Download" button.

The Twist: The DSL-3890 is what is known in the industry as an ISP-OEM (Original Equipment Manufacturer) model. While D-Link manufactured the plastic shell and the circuit board, the "brains" of the router—the firmware—were often customized by the ISP (such as StarHub in Singapore or other regional providers).

Because the ISP customized the firmware to lock the device to their network or pre-configure settings, D-Link cannot legally or technically host that specific firmware file on their public global servers. This is the first major plot hole in the user's journey: the manufacturer’s website disowns the product.