The firmware update tool and Release notes for Iridium Firmware Update HL19004 may be downloaded below.
How to check current Firmware:
Before updating the Firmware on your Iridium Extreme 9575 it's important to know what firmware version your phone currently has installed. To check the current version:
1. On the main screen, select Menu
2. Scroll down and select Setup
3. Scroll down and select Phone Information
4. The Firmware Version will be the first option
Firmware update files: