AST SpaceMobile Completes First Space-Based Voice Call

AST SpaceMobile, a company building the world’s first space-based cellular broadband network, has successfully completed the first-ever two-way voice calls directly to everyday unmodified smartphones using the BlueWalker 3 (BW3) satellite. The feat marks a significant milestone in the company’s mission to provide connectivity to the nearly 50% of the global population who remain unconnected from cellular broadband.

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Also Read: AST SpaceMobile Aims to Expand Space-Based Cellular Connectivity

Validation of Technology

AST SpaceMobile’s patented system and architecture were validated by the initial test calls, which were completed using unmodified smartphones. The calls demonstrated the power of the BlueWalker 3 satellite, the largest-ever commercial communications array deployed in low Earth orbit (LEO).

The company says this is a crucial step towards providing space-based 2G, 3G, 4G LTE, and 5G cellular broadband globally. Engineers from Vodafone, Rakuten, and AT&T participated in preparing and testing the first voice calls with BW3.

Also Read: Sateliot Successfully Launches 5G-IoT LEO Satellite

First Voice Call from Midland, Texas, to Rakuten in Japan

According to the statement, The first voice call was made from the Midland, Texas area to Rakuten in Japan over AT&T spectrum using a Samsung Galaxy S22 smartphone. In addition to test calls, AST SpaceMobile engineers conducted initial compatibility tests on a variety of smartphones and devices.

The phones successfully exchanged Subscriber Identification Module (SIM) and network information directly to BW3. This is crucial for delivering broadband connectivity from space to any phone or device.