Iridium 9555 - Firmware Update Version HT19002

This article provides guidance on updating your Iridium 9555 handset to firmware version HT19002. This version is compatible with all Iridium 9555 hardware revisions from HT11001 and later.

Important: This update must be performed using a Windows computer.

Before Your Begin

Check Your Current Firmware Version

1. From the main screen, press Menu.
2. Scroll to Setup, then press Select.
3. Scroll to Phone Information, then press Select.
4. Your current Firmware Version will be displayed at the top of the screen.

Prepare for the Update

Before starting the firmware upgrade:

• Use a Windows computer only (macOS is not supported).
• Remove the SIM card and reinstall the battery.
• Ensure both the phone and computer batteries are fully charged.
• Disable Bluetooth on the computer to prevent conflicts.
• Do not disconnect the device or press any buttons during the upgrade.
• The phone screen may go blank during the process—this is expected.

The full update may take 20 minutes or longer to complete.

Step-By-Step: Updating to HT19002

1. Download and Run the Installer

• Download the HT19002 installer from: https://www.iridium.com/idr-file/303126?idr_force_download=1. 
• Once the installation is complete, click Open file.
• Run the file:Iridium 9555 Software Upgrade HT19002 Installer.exe
• The installer will place the Upgrade Tool and USB drivers, into the following location:
  C:\Program Files\Iridium\9555\Directory.
  

Follow the on-screen instructions to allow, continue, or next, depending on your computer's pop-up notices.

2. Connect the Phone

• Connect the Iridium 9555 to your computer using the USB cable.
• If this is your first time connecting the handset to this PC:
  • Windows will show automatically a notification "New Hardware Installed". Wait for it to show before proceeding.
  • If Windows cannot locate the driver, browse to:
    C:\Program Files\Iridium\9555\USB\VCOMPORT

3. Launch the Upgrade Tool

Navigate to the upgrade tool manually:

1. Open File Explorer
2. Go to: This PC > OS (C:) > Program Files > Iridium > 9555 > Upgrade_Tool
3. Double-click:
   Iridium 9555 Software Upgrade HT19002.exe

4. Complete the Firmware Update

• Follow the on-screen instructions provided by the upgrade tool.
• The process may take 20 minutes or more.
• Do not interrupt the update.

Once complete, the device will reboot and operate on the new firmware.