: Upgrading often resets the router to factory defaults. Note down your ISP username, password, and Wi-Fi settings before starting. How to Update Your D-Link DSL-2750U Go to product viewer dialog for this item.
The most critical step in the process is verifying your device's hardware version. The D-Link DSL-2750U has several hardware revisions (e.g., v1, v2, C1), and using the wrong firmware can cause permanent damage. dlink dsl2750u v2 latest firmware update link