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Table of Contents

3CX Firmware Upgrade Strategy Introduce


  1. Confirm the Firmware Server Path parameter of the phone is the URL of 3CX.
    It should be like this

  2. Delete the roms in firmware_new

  3. Download the firmware from 3CX or Htek, and also download the convert firmware if it is needed.

  4. If the phone need to upgrade to the convert firmware first, put the conversion firmware to firmware alone.

  5. Reboot the phone to upgrade to the convert firmware.

  6. Put the final firmware to the firmware after you confirm the phone has been upgrade to the convert firmware.

  7. Reboot the phone again to upgrade to the final firmware.

Recently big difference firmware

Latest firmware


The recently of 3CX is

Recently big difference is from version < to version > So

You could download the convert version is the convert version.You could download it from from the below link: 

If you have any further issue, please contact Htek Support Team (, thanks.