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How to Update Xiegu G90 Firmware? | 2023 Latest Guidance

This is the latest Xiegu G90 firmware update guidance for you all. With every new firmware releasing, more and more new features are available.

The following items are needed:
A. USB-to-Serial cable
B. G90
C. A computer running the Windows (XP/Vista/7/8/10/11) operating system
D. A 12-15V DC power supply (capable of supplying not less than 5A)

1. Install USB-to-Serial cable:
The very first thing is to make sure that the USB-to-Serial cable is working properly with the personal computer. The first time the cable is plugged into a USB port on the computer, the operating system will search for a driver file for this new hardware and automatically install the driver program. If all has gone well, we will be able to see the virtual serial port in the device manager program. If the driver file can’t be automatically installed by the operating system we will need to install it manually (driver files are available from the Radioddity G90 support page).

(Note: very early Xiegu USB-to-Serial cables used the Prolific Chip, currently supplied cables use a chip from FTDI, the old cables tended to be black in colour, the newer ones blue.)

After this action the virtual serial port and its port number will be visible in Windows Device Manager.


2. Wiring everything up:

2.1 Connect power cable

2.2 For updating the firmware in the head unit:

2.3 For updating the firmware in the base unit:

3. Update firmware via TeraTerm terminal software
(supplied in firmware zip file from Radioddity):
In order to transfer the firmware to the device, we use a serial terminal software program with XModem support called TeraTerm.

However, we are finding that some of the more aggressive Web Protection/Virus/Malware applications may be stripping the update and firmware files from the downloaded archive, or when the archive is extracted. The following link will allow you to download a certified virus-free Tera Term application used for the G90 update process.

RE: teraterm-4.105

On any executable application, Right-Clicking on the app will open a selection box in which Run as Administrator is an option. Selecting Run as Administrator will ask for your permission to let the app make changes to your computer - Click YES

You will next see this:

Click on the I accept the agreement option and click Next

You will be given the option to accept the default installation location or Browse for a new one:

Click Next

Accept the defaults and click Next

Select Language and click Next

Select default or Browse for Start Menu Folder and click Next

Select additional tasks/options and click Next

Confirm installation options and click Install

Select Launch Tera Term and click Finish

Open Device Manager, Click on Ports (COM & LPT)

Observe Port number -- Right-click on the USB Serial Port (COMx) --x is the Com Port Number.

Select Properties, then Port Settings. Confirm Bits per seconds is 115200. Click OK


In the Window for Tera Term New Connection, click on the Serial selection and confirm it matches the port number in Device Manager.

Click OK in the Tera Term New Connection Window.


The Tera Term Window opens.

Plug the Data Cable into the rear connector on the G90 labeled COM.


Click on the Setup tab at the top of the Tera Term Window and select Serial Port


Confirm the Speed is 115200 Click New Setting



With G90 connected to a 13.8 Volt DC Power source capable of at least 6 amps current capacity...

HOLD SPACEBAR DOWN and push the G90 Power button


Choose 1. Update FW

Erasing message and precent shown


When the old firmware is erased and the message displayed is Wait FW File,


In Tera Term Click File → Transfer → XMODEM → Send In that order


Select Main Unit firmware update file (download the latest firmware of Xiegu G90)


Check the 1K Option Box The transfer will not work if you do not do this!


Click Open





Remove power count to 5 and reconnect power

Remove the plug from the rear and insert in the lower left-hand socket on the Display Head

Press Volume Knob in and power-on the Display Unit
(for G90 radios with Serial Numbers containing the letter V as the prefix (ONLY those containing a V as the first character of the Serial Number)


HOLD SPACEBAR DOWN and press G90 Power Button
(for G90 radios with Serial Numbers not containing the letter V as the prefix)

The Display will be Blank from this point until completion

Select 1 Update FW

When the TeraTerm displays Wait FW File

In this order, select






Select Display Firmware file

Place a Check mark in the 1K Box


Click Open





IGNORE THE LOST COMM Message if it appears

On Completion, remove power from the G90 and count to 5

Re-Connect power to the G90. turn radio on

Hold Function button in for 2 seconds

Using the next button scroll to option 10 Version:

BASE V1.75
Sep 5 2020

APP V1.75
Sep 5 2020



  • Reed A Horonick

    The latest firmware will disable the ability to adjust the left and right filters independently, It will revert to a “passband” adjustment. I tried older firmware and I was able to get the adjustment back but then the receive went totally dead. So I had to go back to the latest firmware but you can’t adjust the filters manually anymore, you just get passband adjustment. If anyone knows how to get the independent adjustment back, please let us know.

  • Dan Rosenthal

    My brother lives in a remote area of Idaho. When his G90 bricked he sent it to me hoping I could update the firmware. Support had recommended this. Instead, I did a factory reset and the radio works perfectly.
    My brother didn’t care about any of the updates, and he was simply happy to get the radio back in the same state he received it. So, factory reset may be an option for others, at least to get the radio working.
    Doesn’t require any computer access. Just hit the FCN button and then PRE to confirm. I had to try the sequence about six or seven times to catch it in time before the screen went blank. But eventually it worked and the radio came back to life.

  • Kellie

    Hi There,

    Trying to do the firmware update but when i hold space bar down and turn the G90 on nothing happens. Any idea what i might be doing wrong? Any advice is appreciated. Thanks Heaps

  • Jim

    To do this on a Mac load bootcamp and a clean copy of windows 7 to 10. Whatever your Mac will allow. Macs actually run Windows better than a lot of windows dedicated machines. Been doing this for years.

  • Harold Yearwood

    I have been told there is a bug in FW v1.75 that puts the radio power level all the way to 20 watts on Tune, potentially causing damage if the antenna is too far out of resonance. Is this true? If so where can I get v1.74 to go back to until v1.76 is released to correct the bug?

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