Iridium have announced firmware updates for the Iridium 9555, 9575 Extreme and 9575 PTT handheld satellite phones.
The 9555 update includes the following:
The 9575 Extreme and PTT updates includes the following:
Whist your satellite phone will continue to operate without these updates it is strongly recommended that you do update your firmware.
You can download the updates by clicking the following links here: