Yes, but only if an external antenna is used. This is also true of the Globalstar, Inmarsat Isatphone Pro and Thuraya satellite phones. All satellite phones require a clear view of the sky in order to communicate with the satellites.
Frequently Asked Questions
It depends on the phone. The Iridium 9555 satellite phone will work anywhere in the world, as long as it has a view of the sky. The Isatphone Pro works everywhere except the far northern and southern lattitudes. Check out the covergage maps on this site for details of these models, as well as for the Thuraya, Inmarsat Isatphone Pro and Globalstar satellite phones.