Iridium atbalsts

Yes. 911 Emergency Service is available in the United States, Puerto Rico and the U.S. Virgin Islands by dialing "911" and pressing "OK"or the green soft key. When the call is made, it is automatically routed to Iridium’s selected 911 emergency call center provider, Intrado. After determining the nature of the emergency, Intrado will route the call to the nearest Public Safety Answering Point. 911 service is not available in Canada.

Iridium has backup electrical power and communication connectivity for both gateway and command and control functions to continue to offer services over the Iridium network in emergency situations. Iridium will support satellite-to-satellite connections without interruption. While most elements of the public switched telephone network (PSTN) should be immune, these are external elements outside of Iridium's control and therefore cannot assure PSTN connectivity in such situations. 

The ability to dial a toll free number is determined by provider of the toll free number.

You can top up your existing SIM electronically without the need for a new SIM.  Once the SIM expires, you have 270 days to reactivate and keep your phone number.