AST SpaceMobile (ASTS) shares declined 10.53% to $36.65, falling $4.32 during the trading session. The drop came even as the company reported a significant technical milestone involving AT&T and its satellite connectivity network. The successful handoff between terrestrial cellular infrastructure and satellite coverage marks measurable progress toward integrated mobile services that span both network types.

AST SpaceMobile and AT&T Complete Satellite Network Handoff

AST SpaceMobile and AT&T completed a successful connection transfer between their respective wireless networks. Telecommunications technology providers Ericsson and Nokia also took part, supporting the network integration. According to the companies, the demonstration represents the industry's first successful handoff between terrestrial cellular coverage and direct-to-device satellite connectivity. In standard cellular networks, handoffs are the routine mechanism that keeps calls and data sessions alive as devices move between coverage areas, and extending that continuity to satellite links is the capability the demonstration set out to prove.

The test took place outside Granite Falls, Washington, on October 21, 2026, at 8:15 a.m. Pacific Time. During the demonstration, the participating networks transferred an active connection without requiring users to manage the transition. The achievement therefore addresses a key technical challenge associated with maintaining mobile connectivity across different network environments.

AST SpaceMobile had previously demonstrated voice calls, text messaging and video calls through its BlueBird satellites, establishing the network's ability to connect ordinary smartphones directly with satellite infrastructure. The latest demonstration, however, focused on a different problem: keeping service intact while devices move between terrestrial and satellite coverage. The earlier tests established that everyday devices could reach the satellites, while this one addressed whether an active connection could hold up across the boundary between the two coverage types.

Ericsson and Nokia Support the Path to Beta Services

Each participant played a distinct role. AT&T supplied its terrestrial wireless infrastructure, while AST SpaceMobile provided the satellite network. Ericsson and Nokia contributed radio access, core network technology and mobility software to enable the connection transfer.

Ericsson supplied AT&T with combined radio and core technology alongside intelligent network automation. The technology coordinates transitions between terrestrial infrastructure and satellite coverage, and it reduces handoff times from seconds to milliseconds. That speed supports service continuity for everyday customers as well as emergency personnel who rely on dependable connections.

Nokia provided radio access technology and mobility software for AST SpaceMobile's space-based network. Its systems support seamless handovers and help maintain connections as devices move between coverage areas. Together, the contributions from Ericsson and Nokia establish an important foundation for integrating satellite connectivity into existing mobile networks. Their involvement also links the satellite system to the same categories of radio access and core network technology that terrestrial carriers already rely on, which underpins the goal of a single integrated mobile experience.

Beta Testing Is the Next Step

The companies identified beta testing under real-world conditions as the next stage of development. These trials are expected to allow the partners to evaluate network performance and refine the handoff process. The broader objective is progression toward commercial services through continued technical development, though further testing remains necessary before any commercial launch. For readers following the program, the near-term markers to watch are concrete: the results of real-world beta trials, refinements to handoff performance, and progress toward the commercial deployment the partners have outlined.

AT&T Senior Vice President of Network Robert Walters described the successful handoff as a significant development and outlined the expected transition toward beta services and eventual commercial deployment.

AST SpaceMobile Chief Commercial Officer Wayne Thorsen highlighted the role of BlueBird satellites in expanding mobile broadband coverage. The company designed its satellite network to work with everyday smartphones, without requiring specialized devices. The system also aims to extend connectivity into remote locations while providing additional communication support for first responders.

The partnership represents steady progress toward combining satellite and terrestrial networks into a single mobile experience. For AST SpaceMobile, the milestone advances its effort to widen coverage through its existing satellite infrastructure. Even so, the immediate development focus remains on beta testing, network integration and preparations for commercial deployment.

This article was originally published on Blockonomi.