METRO Magazine Logo
MenuMENU
SearchSEARCH

An Inside Look at the Partnership that Will Boost SFMTA's Mobile Coverage

Boldyn Networks is delivering next-generation communication services across the Bay Area with its recently announced partnership with AT&T.

July 28, 2023
An Inside Look at the Partnership that Will Boost SFMTA's Mobile Coverage

Through this partnership, millions of passengers will be getting improved wireless connectivity across tunnels, stations, railcars, and surrounding areas.

Photo: SFMTA

2 min to read


AT&T and Boldyn Networks recently announced they are bringing coverage expansion for the San Francisco Municipal Transportation Agency (SFMTA). 

Through this partnership, millions of passengers will be getting improved wireless connectivity across tunnels, stations, railcars, and surrounding areas.

Ad Loading...

Benefits of the AT&T, Boldyn Networks Partnership

Transport connectivity benefits the community by delivering connectivity-driven enhancements to residents and businesses across the Bay Area, according to Christos Karmis, CEO of Boldyn Networks’ U.S. business. 

“The SFMTA network we’ve deployed helps improve the passenger experience, enables operational efficiencies, and boosts public safety,” Karmis said. “The SFMTA network also extends our existing high-density fiber footprint in the region, delivering the backbone required to improve 5G wireless connectivity, data center access, and enable connected buildings with indoor 5G coverage.”

Karmis also explained how this partnership developed.

“Our expertise in delivering 5G connectivity for some of the world’s largest and most complex transit systems in the U.S. and globally, coupled with BART’s commitment to enhancing the customer experience through their digital transformation initiatives, made us ideal partners to improve broadband connectivity for riders of the Central Subway system,” he added.

Boldyn Networks' Past Partnerships

Boldyn Networks has partnered with transit agencies in the past to bring connectivity to some of the biggest subway systems in the world, including the SFMTA and BART in the Bay Area, Sound Transit in Seattle, the MTA in New York City, TfL in London, UK, and more.

Ad Loading...

Highlights from past partnerships include:

  • In 2020, Boldyn Networks deployed its wireless connectivity infrastructure for Seattle’s Sound Transit multi-phase light rail system as part of the largest transit expansion project in the country. 

  • On the East Coast, Boldyn deployed its cellular and Wi-Fi connectivity across New York City’s underground metro system, including a dedicated 4.9 GHz public safety band licensed to the Metropolitan Transportation Authority (MTA). 

  • Boldyn Networks also transformed London's Underground “Tube” when it partnered with Transit for London (TfL) to bring 4G and 5G wireless connectivity to the city's passengers.

  • In Hong Kong, Boldyn Networks brought connectivity to the Mass Transit Railway (MTR) system, including connectivity for autonomous trains on the South Island Line.

Boldyn Networks is deploying connectivity across the BART system, including its “Fleet of the Future” trains.

“We look forward to sharing more on upcoming projects as we continue to expand our connected transport portfolio,” Karmis said.

Subscribe to Our Newsletter

More Technology

An ABQ RIDE bus going through a Westmatic wash system.
Technologyby Staff and News ReportsMarch 16, 2026

Biz Briefs: Westmatic in Albuquerque, New Fare Payment Systems, and More

In METRO's latest installment, we take a look at the latest news from suppliers including Alstom, Modeshift, and more.

Read More →
Photo of a traffic signal
TechnologyMarch 16, 2026

AI Bus Lane Enforcement Boosts Safety, Reliability in West Hollywood

Traditionally, bus lane enforcement has relied on manual processes carried out by transit police or parking enforcement officers. While it may be effective in certain municipalities, this approach is resource-intensive and very difficult to sustain.

Read More →
A Coach USA vehicle wrapped for Newark International Airport service.
TechnologyMarch 11, 2026

Scaling Smart: How Fleet Operations Can Cut Downtime and Drive Growth

A phased approach to technology, in-house capabilities, and workforce investment is helping transportation leaders break the reactive cycle and build more resilient, revenue-focused operations.

Read More →
Ad Loading...
A Sound Transit Link light rail vehicle in a station
Technologyby Staff and News ReportsMarch 10, 2026

INIT Introduces Open Payments for Seattle’s ORCA Fare System

The landmark event empowers riders across six agencies in the Puget Sound region to tap-and-ride transit using a contactless credit or debit card or a mobile wallet.

Read More →
An MBTA paratransit vehicle.
Technologyby Staff and News ReportsMarch 9, 2026

METRO Opens Submissions for 2026 Innovative Solutions Awards

Now in its latest edition, the awards recognize forward-thinking solutions that improve safety, operational efficiency, sustainability, rider experience, and overall system performance.

Read More →
Cover photo for Biz Briefs dated March 6, 2026
Technologyby Staff and News ReportsMarch 6, 2026

Biz Briefs: Tolar Manufacturing Supports PSTA Spark Service and More

Stay informed with these quick takes on the projects and companies driving progress across the transportation landscape.

Read More →
Ad Loading...
Cover Photo for METROspectives with Timothy Menard
TechnologyMarch 5, 2026

How AI and Innovation Are Powering the Future with LYT’s Timothy Menard

Menard discusses how data-driven signal prioritization is improving efficiency, reliability, and ridership, while offering insight into the innovations driving the next generation of smart mobility. Together, they explore how technology and collaboration are paving the way for a more connected, sustainable future in transit.

Read More →
An NJ TRANSIT bus
Technologyby StaffMarch 4, 2026

NJ Transit Pilots AI-Powered Digital Bus Stop Signs

The pilot program showcases two companies’ technology at eight bus stops. The companies submitted their ideas through the Transit Tech Lab, which is backed by the Partnership Fund for New York City and provides an accelerated pathway for early to growth-stage companies to solve public transportation challenges for the largest transit agencies in North America.

Read More →
Cover photo for Biz Briefs
Technologyby Staff and News ReportsFebruary 26, 2026

Biz Briefs: Hitachi Rail in Philadelphia, Keolis in Nantucket, and More

Stay informed with these quick takes on the projects and companies driving progress across the transportation landscape.

Read More →
Ad Loading...
MBTA passengers at rail station
Technologyby StaffFebruary 24, 2026

Boston's MBTA Advancing Major Signal Modernization to Improve Red Line Reliability

To accomplish this work, the MBTA announced that four phases of temporary evening service changes will begin on February 28 and continue through April.

Read More →