Iridium have released a firmware upgrade for the Iridium Extreme 9555.
The latest firmware is version is HT17001.
This upgrade is a recommended upgrade only, meaning that the features introduced are important but not critical for using your Satellite Phone.
We always recommend that you upgrade to the most recent firmware version to ensure the best experience with using your phone.
We recommend that you follow the instructions below to upgrade as soon as possible.
You can view more details and download the latest firmware below: