T-Mobile US is testing AI to allocate radio resources on its 5G-Advanced network, with Ericsson trial results showing the biggest gains during peak traffic.

The operator is trialling AI-Managed Beamforming on live commercial traffic at scale. Chief network officer Ankur Kapoor (pictured) outlined the results in a blog post. The work focuses on sounding reference signals (SRS), short transmissions from phones that help the network measure the path between a device and a cell site and direct beams more accurately.

Due to those resources being limited, they have traditionally been allocated under fixed rules. T-Mobile instead uses a supervised-learning model trained on its network data and running on Ericsson’s RAN compute and silicon to predict where demand is rising and redirect resources accordingly.

Kapoor explained training the model on T-Mobile’s data gives it an advantage on the operator’s network over networks which do not contribute their own tuning data.

The results came from newly activated sites in New York City, but the blog did not say how many were included or give a baseline for the trial.

T-Mobile reported the biggest gains during peak hours, including about a 50% increase in advanced beamforming using full-band SRS, a 16% improvement in downlink user throughput, 12% better spectral efficiency and a 10% increase in downlink data volume.

In May, the companies reported close to 10% better spectral efficiency from a separate AI-native scheduler with link adaptation on live traffic.

Kapoor said the technology suits T-Mobile’s network because beamforming works particularly well in TDD spectrum, where uplink and downlink share the same band, and the operator has a leading position in midband TDD.

He linked the trial to rising network demand, citing Ericsson’s June 2026 Mobility Report, which reported global mobile data traffic growth of 22% year-on-year. Video accounted for about 75% of traffic and 5G subscriptions topped 3.1 billion.

Jaco du Plooy, SVP and head of the T-Mobile customer unit at Ericsson Americas, stated the trial marked another step toward networks which respond more intelligently to demand, enabled by Ericsson’s silicon.

Kapoor said 6G networks will need to sense, learn and respond to support applications such as distributed AI, robotics, vision AI and other forms of physical AI, describing T-Mobile’s nationwide 5G-Advanced network as its proving ground.

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T-Mobile US, Verizon and AT&T sealed their joint venture (JV) to expand coverage across areas of the US that terrestrial services cannot reach, in a rare example of cooperation between the big three.

The move followed an announcement in May outlining how the operators planned to pool their spectrum resources to eliminate “dead zones” by expanding satellite coverage for customers nationwide.

Former AT&T, Cingular Wireless and Ameritech executive Paul Roth is serving as the interim CEO of the JV while a search for a permanent chief is underway. The entity will be managed by a board with representatives from each founding member.

The companies stated the JV will “nearly eliminate dead zones in the U.S. currently without mobile service, reaching previously unserved areas” to cut down on coverage gaps.

It will also be beneficial for first responders during natural disasters or other disruptions by providing connectivity when terrestrial services are down.

They claim the new service will also provide a better customer experience for direct-to-device (D2D) consumer services through the unified approach.

T-Mobile notably has launched a commercial D2D service in collaboration with SpaceX, while Verizon has rolled out a satellite messaging service with Skylo Technologies. Verizon and AT&T are also separately working with AST SpaceMobile.

AT&T Business has a partnership in place with Jeff Bezos’ Amazon Leo to provide connectivity to businesses across the US. SpaceX is also mulling a mobile service through its Starlink birds, but the industry is somewhat sceptical of its approach.

The operators stated the venture will also be a boon to additional satellite providers while also collaborating closely with rural mobile operators to expand access and simplify integration.

The service could emerge as a threat to cable operators such as Cox Communications, formerly Charter Communications, Comcast and smaller providers across rural areas which are currently losing broadband subscribers to fixed wireless access services offered by the trio.

The combined use of each operator’s spectrum will improve efficiency while enabling mobile operators to deploy new services at a faster rate.

The JV also plans to take a standards-based approach to satellite services while allowing each of the three to continue their individual efforts across the sector.

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