To update your D-Link DSL-2750U (Hardware Version C1), the latest official firmware typically available is version ME_1.10_B038. Where to Download
Conclusion
Since this is an older ADSL2+/Broadcom-based router with limited flash/RAM, the feature is designed to be lightweight, practical, and retro-innovative rather than a heavy modern add-on. firmware dlink dsl2750u h w c1 new
The C1’s RT3883 chipset now supports:
OpenWrt Support: Official support ended in 2022 (v19.07.10 was the last stable build for 4MB flash/32MB RAM devices). To update your D-Link DSL-2750U (Hardware Version C1)
: Connect your computer to the router via Ethernet. Open a browser and go to 192.168.0.1 192.168.1.1 . Log in using for both username and password (unless previously changed). Locate Update Section : Navigate to the Maintenance tab and select Firmware Update from the left-hand menu. Upload File Choose File , select the firmware file you downloaded, and click Wait for Completion : The process takes approximately 2 minutes. Do Wi-Fi Performance The C1’s RT3883 chipset now supports:
Updating this model requires a manual approach via the web interface: D-Link DSL-2750u C1 - [OpenWrt Wiki] Techdata