User Manual

Current Firmware: HP21001 (as of 27/10/22)

Firmware Updating Tool -

  • The following steps should be used to upgrade an Iridium Extreme® PTT from version HP15003 or later.
  • Run the upgrade installer application.
  • The application is named “Iridium Extreme Push-to-Talk Software Upgrade HP21001 Installer.exe"
  • This will place the upgrade tool and USB drivers into the C:\Program Files\Iridium\ExtremePTT directory

Prior to performing the upgrade complete the following:

  • Disable Bluetooth on the PC running the upgrade
  • Remove the SIM card from the handset and install the handset battery
  • Turn the handset on
  • Ensure that the battery is fully charged or a charger is connected to the handset
  • Connect the handset to the PC using a USB cable

If the handset is being connected to this PC for the first time, or to a USB port that has not been used before, the driver will be installed automatically. If this is the case, wait for Windows to show the "New Hardware Installed" notification before proceeding.

If Windows is unable to automatically locate the USB driver, it can be found at C:\Program Files\Iridium\ExtremePTT\USB\VCOMPORT

    Run the Iridium Extreme PTT Software Upgrade tool

      A shortcut to this application should be available in the Start Menu in the Iridium Extreme Software Upgrade folder

      The target of the shortcut is C:\Program Files\Iridium\Extreme\Upgrade_Tool\ Iridium Extreme Push-to-Talk Software Upgrade HP21001.exe

        Follow instructions presented by the upgrade tool user interface

          During the upgrade process the handset will display various information on the screen, including “Upgrading…”

          At times the handset screen may go completely blank

          Do not disconnect the handset or press any keys while the upgrade is in progress