Updating GD-77 Firmware

Updating the firmware on the GD-77 can be daunting, as you can easily “brick” your radio. So be extremely careful.

Make sure you understand why you are updating your firmware first. Since there is the option of “Bricking” your radio, and I only have the one digital radio, I decided not to update the firmware unless I had the need and then was sure it was a stable version. Remember, don’t fix something that isn’t broken. Once it is broken, you can’t fix it if it becomes a brick.

At the time of writing this, I was told version 3.1.8 was the latest most stable version. Clearly this will change, so do your own current research. So the first step is to download that version, and the software to download it onto the radio.

Download latest firmware updater software from https://www.radioddity.com/pages/radioddity-download and save it on your PC.

Then after extracting the downloaded file, go into the Update Software folder and into the English folder and run the Update.exe file.

Browse to find the firmware you have chosen to download to the radio. It will be a .sgl file.

Firmware downloader

Then, plug in the radio via the USB cable and before turning on the radio, press both buttons at the same time bellow the PTT button, then turn radio on. Only the green light should turn on with a blank display.

Make sure you have selected the correct port on the update software. Then press download to update the firmware on the radio.

Once download has completed, turn radio off, disconnect and turn it back on to check it works.

You might want to updated to the OpenGD-77 firware though. I show you how to do that here.

Other Reads

Here are some other posts I have done on a similar topic


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