Globalstar Inc is the company that provides Globalstar satellite phone service. Globalstar mobile satellite phones have been produced by several manufacturers, but the most popular globalstar satellite phones are manufactured by Qualcomm. Those models are the GSP-1600 satellite phone and the GSP-1700 satellite phone. In fact, the first satellite phone call placed on the globalstar network was placed by Qualcomm founder Irwin Jacobs on November 1, 1998. Globalstar satellite phone users have experienced major service interruptions in recent years due to issues with Globalstar’s satellite fleet. In response, Globalstar is in the process of launching new satellites. Globalstar appears to have around 250,000 satellite phone subscribers.