T-Mobile has deepened its fiber ambitions with two new fiber joint ventures (JV).

The carrier announced today (April 28) that it has forged a 50-50 JV partnership with Oak Hill Capital to acquire and combine GoNetspeed and Greenlight Networks, and a separate 50/50 joint venture with Wren House to acquire i3 Broadband.

In total, the carrier expects the JV's to expand its fiber footprint to more than one million additional homes nationwide.

The timing of the announcement comes as T-Mobile prepares to report its Q1 earnings. During the carrier's previous earnings call, Srini Gopalan, CEO of T-Mobile, said the company was keen to explore more M&A fiber deals.

“These partnerships are about expanding access to high-performance fiber for more customers,” said André Almeida, chief broadband, enterprise, and emerging business officer at T-Mobile.

“We’ve built strong momentum in fiber, and these JVs allow us to scale faster by combining leading fiber operators with T-Mobile’s brand, distribution, and customer experience to meet growing demand for fast connectivity options.”

T-Mobile aims to reach 12 to 15 million households with fiber by the end of 2030. The carrier notably sealed its acquisition of Lumos last year as part of a JV with EQT Infrastructure, along with its fiber JV acquisition of Metronet a few months later.

By the end of the decade, the carrier expects to hit between three and four million fiber subscribers.

The company's proposed JV, along with Oak Hill Capital, will see it combine Oak Hill’s existing fiber portfolio companies, GoNetspeed and Greenlight.

This will bolster T-Mobile's fiber presence in the Northeastern US, with a current presence in states including Connecticut, Maine, Maryland, Massachusetts, New Jersey, New York, Pennsylvania, and Rhode Island. GoNetspeed and Greenlight are expected to pass more than 1.3 million households by the end of 2026.

T-Mobile said it will invest $2 billion to acquire a 50 percent equity interest in the JV and substantially all existing residential fiber customers. The telco anticipates the deal will close in the first half of next year.

“We have enjoyed Oak Hill’s partnerships with GoNetspeed and Greenlight and are tremendously proud of the growth we have achieved together with Richard Clark, Mark Murphy, and their respective teams,” said Scott Baker, managing partner at Oak Hill. “By leveraging T-Mobile’s capabilities, we believe that GoNetspeed and Greenlight are positioned to accelerate fiber-to-the-premises construction and to deliver reliable, high-speed connectivity to even more underserved communities across the Northeastern and mid-Atlantic US.”

As for its JV with Wren House for the acquisition of FTTP i3 Broadband, T-Mobile noted it will invest $700 million for its stake in the JV, plus substantially all existing residential fiber customers.

i3 Broadband is on track to pass approximately 500,000 households by the end of 2026, across current markets including those in Missouri, Illinois, and Rhode Island. The deal is set to complete in the second half of this year.