T-Mobile, Jio, Syniverse Launch World's First 5G Standalone Roaming Connection
September 21, 2026
The collaboration among T-Mobile, Reliance Jio, and Syniverse is framed as a foundational, future-ready step for global 5G standalone roaming, with industry leaders highlighting its significance for seamless cross-border experiences.
Ankur Kapoor, T-Mobile’s chief network officer, calls the milestone monumental and stresses continued leadership in 5G standalone development with Jio as a global partner.
Syniverse’s connectivity platform is central to securely interconnecting networks and accelerating worldwide adoption of next-generation roaming.
John Wick, Syniverse’s chief product officer, says the milestone proves secure interworking and advanced mediation can make global 5G SA roaming commercially viable.
Syniverse emphasizes its role in enabling secure interworking and mediation to ensure global 5G SA roaming becomes commercially viable as more operators join.
The move builds on existing 4G roaming agreements and aims to deliver faster speeds, lower latency, and more reliable global connectivity, with benefits for IoT, real-time communications, and immersive tech.
Leaders describe the milestone as a step toward seamless cross-border 5G experiences and the future of 5G SA interoperability between networks.
T-Mobile and Reliance Jio have achieved the world’s first 5G standalone roaming connection, enabling 5G SA roaming for T-Mobile customers traveling internationally.
The roaming enables T-Mobile customers to use 5G SA on Jio’s network in India and Jio customers to roam on T-Mobile’s 5G SA network in the United States.
The collaboration is announced as the world’s first 5G Standalone roaming connection, enabled through interoperability with Syniverse.
Mark Yarkosky of Jio highlights cross-network capabilities, services for consumers and enterprises, and the AI-enabled offerings made possible by 5G SA.
Summary based on 2 sources
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Sources

Business Standard • Sep 21, 2026
T-Mobile, Jio launch world's first 5G Standalone roaming connection
ET Telecom • Sep 21, 2026
T-Mobile says achieves world’s first 5G SA roaming connection with India’s Jio