Please be advised that the deadline for IsatPhone Pro users to update the firmware on their phones to version 5.3.0 has been extended to Friday, 28 November 2014.
The operational changes to the 
IsatPhone Pro network, originally scheduled for 18 April 2014, have been postponed to allow users more time to carry out the firmware update.
In addition, Inmarsat have released IsatPhone Pro firmware version 5.5.1. Firmware version 5.5.1 will supersede the (mandatory) firmware version 5.3.0 released in February 2013.
PLEASE NOTE: Installation of firmware version 5.3.0 or higher is critical to the continued use of IsatPhone Pro after the end of November 2014. All IsatPhone Pro users are therefore requested to install firmware v5.3.0 or v5.5.1 without delay, as no further extension to the upgrade deadline can be expected.
Firmware is available for download here.
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