Difference Between Satellite and Cellular

Globalstar: the world's only satellite AND cellular phone.
The Globalstar handset is three phones in one with built-in technology to easily access 800 MHz CDMA cellular, analog cellular, and the Globalstar digital satellite system. With the satellite antenna down, Globalstar automatically searches for a connection to the local analog or digital CDMA cellular networks. If cellular services are unavailable, just lift the Globalstar system antenna, and the phone will automatically seek the Globalstar satellite network.

The Difference Between a Cellular Call and a Globalstar Satellite Call
Globalstar satellite service is specifically designed for use in locations where traditional phone networks are unavailable or unreliable. For example, inside a building or in an urban city, you could use standard cellular phone service. When at work or play in a remote area, just pop up the Globalstar satellite antenna for access to the unparalleled reliability and clarity of Globalstar.