In fact I just looked at their website and they have a set up called Skyconnect in their product/handheld section.
Here's what it says...
Clear phone calls anywhere-any altitude
For the first time, Iridium aeronautical satellite communications service provides aircraft crew and passengers with reliable, worldwide communications including the Polar Regions. The aeronautical terminal equipment for the Iridium system is significantly smaller, lighter and lower priced than existing satellite communications equipment and can be installed in helicopters to fast jets.
That should do the trick.
McH