AT&T and AST SpaceMobile, with supporting network technologies from Ericsson and Nokia, have demonstrated what the companies describe as the industry's first successful handoff between a ground-based cellular network and a direct-to-device (D2D) satellite network.

The demonstration, conducted October 21, 2026, outside Granite Falls, Washington, represents an important step toward integrating satellite connectivity with existing mobile network infrastructure. The test demonstrated the transfer of an active connection between AT&T's ground-based wireless network and AST SpaceMobile's BlueBird satellite network, using everyday smartphones.

The achievement addresses a significant technical challenge for hybrid terrestrial and non-terrestrial networks: maintaining service continuity as users move between cellular coverage and satellite connectivity.

Ericsson contributed radio, core network, and intelligent automation technologies supporting AT&T's network, while Nokia provided radio access technology and mobility software supporting AST SpaceMobile's space-based network.

“The successful handoff is a significant milestone, but it’s not the finish line. The next phase is expected to include beta services under real-world conditions, allowing the companies to further refine performance,” says Robert Walters, SVP Network, AT&T. “The broader objective is to progress ultimately to commercial service.”

Source: AST SpaceMobile

Stay Connected with ISE Magazine 

Subscribe to our newsletters and magazine for the latest telecom insights, explore the current issue for in-depth features and strategies, and register for upcoming webinars to learn directly from industry leaders.