AT&T and Boldyn Extend 5G Service on MTA G Line

AT&T, in collaboration with Boldyn Networks, has launched 5G cellular service in the Metropolitan Transportation Authority’s (MTA) Crosstown G train tunnel segments between Court Square in Queens and Bedford–Nostrand Avenue in Brooklyn. The deployment enables uninterrupted mobile connectivity for passengers travelling underground between the two boroughs.

The activation follows the recent launch of AT&T 5G service in the Joralemon Street tunnel, which links Bowling Green station in Manhattan with Borough Hall station in Brooklyn on the 4 and 5 train lines.

The expansion of 5G coverage in both locations marks AT&T as the first and only carrier providing 5G services in the sections of the city’s subway network.

John Emra, President, Atlantic Region, AT&T, says: “Every new section we light up brings us closer to a fully connected New York. By working closely with Boldyn Networks and the MTA, we’re helping ensure reliable, high-speed 5G is part of the everyday transit experience for New Yorkers.

"We’re proud to be the first and only carrier to deliver that enhanced experience to the G line.”

The deployment is part of Boldyn’s broader network expansion project with the MTA, designed to deliver full 5G coverage across the entire New York City Subway infrastructure, including both stations and tunnel systems.

MTA network expansion advances with Boldyn project

Under Boldyn’s ongoing contract with the MTA, cellular and Wi-Fi coverage will be extended across all 418 track miles of subway tunnels in the city.

The project’s objective is to create universal underground connectivity, allowing passengers to maintain access to mobile networks and data services as they travel through previously uncovered segments.

Ken Ranger, Senior Vice President of Transit Operations, US, Boldyn Networks, says: “Progress like this happens through collaboration, innovation and a shared commitment to the people of New York. We’re proud to continue our work with the MTA and AT&T to bring high-speed connectivity to the G line.

"These milestones represent more than infrastructure, they’re about improving daily life for riders and creating a smarter, more connected city.”

The network extension builds on Boldyn’s earlier efforts delivering service to the 42nd Street Shuttle line and the Canarsie tunnel, which connects Bedford Avenue station in Brooklyn with 1st Avenue station in Manhattan on the L train line.

Cellular and Wi-Fi services are already available in all underground subway stations across the network. The integration of tunnel coverage represents the next phase in the MTA’s push for end-to-end connectivity.

AT&T expands 5G coverage through tunnel infrastructure

AT&T’s collaboration with Boldyn forms part of its broader regional strategy to enhance 5G access across metropolitan transport infrastructure in the United States. It is targeting to increase its service reliability in high-capacity urban environments such as New York’s subway, where millions of passengers depend on mobile access daily.

John says its coordinated approach with Boldyn and the MTA is designed to produce consistent service quality across the expanding network. “By working closely with our partners, we’re ensuring reliable, high-speed 5G becomes part of the everyday transit experience for New Yorkers,” he says.

Boldyn and the MTA have positioned the tunnel connectivity project as a long-term digital infrastructure upgrade, providing stronger operational systems for the transit authority while enabling passengers to connect continuously between stations.

The G line extension continues that framework of collaboration between a public operator and private telecommunications partners.

Boldyn and AT&T maintain New York subway leadership

The continuing partnership between AT&T and Boldyn highlights the private sector’s role in supporting the MTA’s digital modernisation programme.

By integrating 5G services through tunnel systems, the project aligns with the wider move to upgrade New York’s public transport communications, safety and passenger information systems.

Ken says the progress demonstrates what coordinated industry engagement can deliver for public infrastructure. “These milestones represent more than infrastructure,” he says, “they’re about improving daily life for riders and creating a smarter, more connected city.”

As the project advances, all mobile carrier customers already benefit from service in multiple tunnel networks, while AT&T maintains its presence as the first on-air 5G provider in both the Joralemon Street and G line tunnels.

It continues to collaborate with Boldyn and the MTA to deliver connectivity across the full extent of the subway network.