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Add expansion microphones to your Konftel

Expansion microphones is available for Konftel 250, Konftel 300, Konftel 300IP and Konftel 300M.

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Konftel 300M - Installing SIM-card

Learn how you install the SIM-card into your Konftel 300M and get started with your conference calls.

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Konftel 300-series SD-call recording

Learn how to record a conference call with the Konftel conference phones. SD-call recording is available in...

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As a cell phone, the Konftel 300M operates over mobile networks that comply with the European standards for 3G and GSM. It also works as a USB audio device.

US version (840101070), 2G: GSM 850/900/1800/1900 3G: UMTS 850/1900
European version (910101070), 2G: GSM 850/900/1800 3G: UMTS 900/2100
Connects to computer with enclosed USB cable, 2.0.
Operating system Audio Upgrade*
Windows XP/Vista/7/8/10 Yes Yes
Mac OS X 10.6/10.11 Yes  
Linux (Fedora 20) Yes  
* Upgrade the conference phone via the Upgrade Utility


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Software upgrade

How to upgrade your Konftel

Konftel 300M upgrade v. 3.1.7

  • Fix issue with some batteries stuck in sleep mode
  • Improved USB compatibility
View changelog

Upgrade your Konftel 300M

Step 1: Install Konftel Upgrade Utility

The Konftel Upgrade Utility is a program developed by Konftel to upgrade the software on your conference phone.

Download and run the installation file and follow the instructions.

You may have to run the installation program as an administrator.

System Requirements
Download Upgrade Utility


Step 2: Upgrade your Konftel conference phone

Launch the Konftel Upgrade Utility, which will now be in your start menu, and follow the instructions.

We recommend that you allow the Konftel Upgrade Utility to automatically download and install the latest software.

When you are done, you can close the Konftel Upgrade Utility and restart your Konftel.

Manual software download

It is also possible to download the latest version and install the file via an SD card. This can be useful if you have restricted internet access or if a conference phone is not installed and connected to the internet. Download the software onto your computer and use the Konftel Upgrade Utility program to upload the file and upgrade your conference phone.

Download software

Konftel 300M Vodafone » View change log

Upgrade via SD memory card

You can also opt to download the SD upgrade file below if you would rather upgrade by inserting an SD card containing the downloaded software into your conference phone. Please note that an upgrade via SD card will reset your conference phone to factory settings.

Konftel 300M SD upgrade » View change log

Konftel 300M Vodafone SD upgrade » View change log

End-user license agreement (EULA)

By downloading the software, you accept the EULA terms and conditions in this document.

» EULA document

Two-year warranty

Peace of mind

All Konftel models come with a two-year warranty. The warranty is invalidated if the product has been damaged due to negligence, incorrect use, manipulation or unauthorized modification or if the product has been subjected to fire, an electrical storm or a power surge. A fee will be charged for returned products that are found to have no faults.

Servicing after warranty

Servicing is available after the warranty expires. Create a ticket and describe the error and we will send you a costing.


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