Visit the Tenda Official Website: Open a web browser and navigate to the official Tenda website (www.tenda.com.cn).
Support & Downloads: Click on the "Support" tab and then select "Downloads" from the dropdown menu.
Product Selection: Choose your product category (Wireless Router) and select the Tenda D305 model.
Firmware Download: Click on the "Firmware" tab and download the latest firmware version available for your router.
Login to Your Router: Open a web browser and type the IP address of your router (usually 192.168.0.1 or 192.168.1.1) in the address bar. Log in to your router using the default admin credentials (usually admin for both username and password).
Upgrade Firmware: Navigate to the "Advanced Setup" or "Maintenance" section and click on "Upgrade Firmware" or "Firmware Update."
Select Firmware File: Browse and select the downloaded firmware file (it should be in .bin or .fw format).
Update Firmware: Click "Upgrade" or "Update" to start the firmware update process. Wait for the process to complete, which may take a few minutes.
Reboot Your Router: Once the update is complete, reboot your router to apply the changes.