How to upgrade MonoLED-BT and DuoLED-BT firmware
This Guide explains how to upgrade Mono/DuoLED-BT Wireless Headsets firmware in order to fix a series of issues.
Mono/DuoLED-BT User Guide: LED Headsets User Guide.
Created: November 2022
Updated: September 2025
Permalink: https://wildix.atlassian.net/wiki/x/AQCvB
Requirements
Windows OS
WIService updated to the latest version
Supported Headsets
The upgrade procedure works only for old generation (pre-2025) MonoLED-BT/ DuoLED-BT headsets.
You can check if your MonoLED-BT/ DuoLED-BT Headsets support the upgrade via WIService wislog.txt, which you can find in the following folder:
Windows: "C:\Users\USER\AppData\Roaming\Wildix\WIService\wislog.txt"
In the "wislog.txt" file, look for Vendor ID and Device ID for the headset. The following Vendor ID and Device IDs belong to new generation headsets and do not support the upgrade procedure:
Vendor ID: 340B
Device IDs: A075, B075, 0008, or 0009
Example:
Upgrade Procedure
In one of the first versions of the Headset delivered to customers, there are certain issues that can be fixed by upgrading:
Impossible to hold/ unhold a call by pressing Multi-function button
Virtual keyboard on Vision (EOL)/ SuperVision (EOL) doesn't work with connected DuoLED-BT
LED indication is disabled after disconnecting second Android/iOS device
LED indication is not switched to Auto/ away status
No audio from mic in Wizyconf after hanging up a call
Mic doesn't work in Wizyconf after a one-on-one call in Collaboration
Beep sounds appearing after changing mic volume level on DuoLED-BT
To upgrade the Headset, proceed with the following steps:
Connect the Base Station to your PC via USB port
Go to Quick Launch Toolbar -> right-click on WIService icon and select Settings
Go to Headset Firmware Update tab and click Update button
Note: if your Headset is up to date, the upgrade is unavailable (Update button is greyed out).
Follow the instructions to prepare the Headset to be upgraded:
Unpair all connected Bluetooth devices if the Headset is connected directly via embedded Bluetooth or disconnect the Base Station from PC
Turn the Headset off and on by pressing Multi-function button
Connect the Headset to your PC via USB port
Once the Headset is prepared, you need to switch it to upgrading mode by pressing and holding Mute and Volume Down buttons for 5-6 seconds
Note: Starting from firmware v. 0x5DE9, there is no need to press and hold the Mute and Volume Down buttons. The upgrade is started automatically after connecting the headset to your PC.
The upgrading mode is activated and the upgrade is in progress
Once the Headset is updated, disconnect it from PC and connect the Base Station to continue the procedure
When connected, the Base Station starts upgrading automatically
After the upgrade is completed, click Done to finish