Grandstream Firmware

Method 1: Open your Grandstream web configuration webpage and set the TFTP server as per the image below:

Handytone 486 users: Check these configuration instructions before upgrading.

Press UPDATE, Click to view your changes and then REBOOT. The phone's firmware should be updated during its reboot. From now on, everytime your phone reboots it will be update to the latest recommended firmware.

Method 2: Download the TFTP application and install it on your PC.

Download the recommended Grandstream firmware and extract the files to a local directory in your PC.

Run the TFTP application and click on Server-->Properties...
Click on the General tab and enter the full path to the location of the firmware files downloaded above in the Default directory field.
Also enable the Overwrite if file exists option.
Press OK to save your changes.

In your Grandstream phone's web configuration page, set the TFTP Server value equal to the IP Address of your PC. Press UPDATE, Click to view your changes and then REBOOT. The phone's firmware should be updated during its reboot.