The safest firmware always comes from the manufacturer. As of this writing, the official Tenda download center still hosts the D305 files.
Official Download Link:
https://www.tendacn.com/download/detail-3175.html
(Always ensure you are on the official tendacn.com or tenda.com.cn domain. Avoid tendadownload.com imposters.)
Cause: You downloaded firmware for the wrong hardware version (V1 vs V2) or region.
Fix: Double-check the sticker on your router. Download the exact match. tenda d305 firmware update link
Important Warning: Do not download firmware from third-party forums or torrent sites. Malicious firmware can brick your router or steal your data.
As of the latest updates, Tenda has migrated many legacy products to different support portals. Here is the official pathway:
Direct Link Method:
Navigate to the official Tenda support download center:
➡️ https://www.tendacn.com/en/download/list-8.html (Note: This is for legacy ADSL products. If the link redirects, use the global site). The safest firmware always comes from the manufacturer
Alternative Working Link (as of 2025):
If the above links do not work (due to regional redirection):
Current File Name Example:
US_D305_V1.0.0.24_CN.zip(or newer version likeV1.0.0.28). Always check the date stamp. If the above links do not work (due
No. The D305 is an ADSL2/2+ modem. It will not sync with VDSL, VDSL2, or fiber connections. If your ISP upgraded to VDSL, the firmware cannot fix this.
Cause: Firmware reset your VPI/VCI or modulation settings.
Fix: Re-enter your ISP’s settings (e.g., VPI: 0, VCI: 35 for many providers). Go to "Network" → "DSL Settings" → Select "Auto Sync" .
Downloading the file is only half the battle. Flashing it incorrectly can brick your router. Follow this guide carefully.
If the specific page is difficult to navigate, you can use Tenda's search function:
The official Tenda site sometimes redirects to a generic search page. If you cannot access the link above, follow these backup methods: