Elon Musk's push to turn Starlink from a satellite internet service into a serious rival to traditional mobile networks is drawing increasingly direct resistance from the US telecommunications industry, with AT&T Chief Executive John Stankey joining T-Mobile executives in questioning whether the technology can compete at scale.
Stankey told Axios that SpaceX's strategy of using its satellite network to challenge established telecom operators was “not a viable strategy.” He argued that terrestrial fiber infrastructure remains fundamentally more capable, particularly as demand for high-speed connectivity continues to rise.
His comments echo criticism from T-Mobile Chief Financial Officer Peter Osvaldik, who recently dismissed Starlink's ambitions and questioned whether satellite technology could overcome the physical and economic limitations of operating a wireless network from space.
The increasingly public disagreement comes as SpaceX seeks to expand Starlink beyond its established satellite broadband business and into direct competition with mobile operators.
T-Mobile questions the physics behind Starlink's mobile ambitions
Osvaldik has been particularly blunt about SpaceX's plans.
He said that “everybody in the know” is laughing at parts of the proposal, while describing some elements of Starlink's direct-to-cell strategy as difficult to fathom from a technical standpoint.
His central argument is based on the physical limitations of satellite communications.
Satellite signals can provide valuable connectivity in remote locations where terrestrial infrastructure is limited or unavailable. But Osvaldik argued that the same technology faces significant challenges in densely populated environments, where buildings, walls and other obstacles can interfere with signals.
He also pointed to something as ordinary as a car windshield as an example of the obstacles satellite signals can encounter.
That, in T-Mobile's view, limits how effectively Starlink can replace the dense network of terrestrial infrastructure used by conventional wireless carriers.
Stankey: Fiber remains the benchmark
AT&T's Stankey offered a similarly forceful assessment, arguing that the fundamental economics and capacity of fiber make it difficult for satellite networks to replace terrestrial broadband infrastructure.
AT&T has reinforced that position with a major investment of its own.
The company announced a $3 billion agreement with Corning to expand its fiber infrastructure and increase its fiber footprint.
Stankey used the investment to underline his argument that terrestrial networks still have a decisive advantage.
He said “nothing beats fiber,” arguing that even if satellite technology reaches its maximum potential over the coming decade, it would still struggle to match the performance and capacity delivered by fiber networks.
AT&T says its fiber infrastructure can deliver speeds that are substantially higher than satellite technology, strengthening the company's argument that the two technologies are not interchangeable in many high-demand applications.
Why Musk's Starlink strategy is attracting attention
SpaceX's ambitions have grown considerably beyond providing internet access to remote households.
Starlink already competes with traditional telecommunications companies for home and business broadband customers. The next stage of its expansion is increasingly focused on mobile connectivity, potentially placing the company in direct competition with wireless operators.
SpaceX President Gwynne Shotwell added to those concerns in August during SpaceX's first earnings call as a public company.
Shotwell predicted that SpaceX could win a meaningful number of customers from established carriers because, in her view, its service would be better.
The comments were followed by a decline in shares of major US telecom companies, including AT&T, Verizon and T-Mobile, as investors assessed the possibility of a new competitor entering the market with a radically different network model.
Starlink's enormous scale
SpaceX's satellite operation is already one of the largest communications networks in the world.
As of June 30, Starlink had approximately 12 million subscribers and more than 10,200 satellites, according to SpaceX's first earnings report as a public company. The network was providing coverage across 167 countries.
The figures underline the scale that SpaceX has already achieved.
Although SpaceX is widely known for its rockets and increasingly prominent artificial-intelligence ambitions, its connectivity operation has become a major part of the company's business. Starlink accounted for approximately 55% of SpaceX's total sales, according to the company's earnings report.
That existing customer base gives Musk a platform from which to pursue a broader communications strategy.
But moving from satellite broadband to becoming a major mobile carrier would present a very different challenge.
The $100 billion problem
Traditional wireless networks depend on extensive terrestrial infrastructure, including cell towers, antennas, fiber connections and other equipment.
Building enough infrastructure to match the capacity and coverage of an established cellular carrier could require enormous investment.
One analyst has estimated that building a terrestrial network capable of turning SpaceX into a genuine fourth major US mobile carrier could cost more than $100 billion.
SpaceX's proposed solution is to avoid replicating the entire traditional cellular network.
Instead, the company has discussed installing small cellular base stations alongside Starlink dishes at homes and businesses. Those installations could provide additional capacity in areas where satellite connectivity alone would struggle to meet demand.
Musk has argued that such a system could eventually provide phones with greater bandwidth and connectivity than consumers currently receive from conventional cellular providers.
Stankey challenges the economics
Stankey disputes the idea that this approach would provide SpaceX with a cheap shortcut into the mobile market.
His argument is that SpaceX would ultimately need to deploy enough small stations to deliver the capacity required by a modern wireless network. At sufficient scale, he said, the cost could approach that of building a conventional macro-cell network in the first place.
There is also a regulatory complication.
Current rules do not generally allow a company to use a customer's property to transmit cellular signals without the owner's permission. SpaceX's proposed model could therefore require changes in regulation or extensive agreements with property owners.
Stankey offered a simple test of the economics: if placing small antennas alongside existing infrastructure were genuinely cheaper and more effective, AT&T would already be taking advantage of its enormous fiber network to deploy similar equipment.
A battle between two different network models
At the heart of the dispute is not simply a disagreement between Musk and traditional telecom executives. It is a clash between two fundamentally different approaches to connectivity.
Starlink's advantage is reach.
Satellites can provide service in remote regions where laying fiber or building extensive cellular infrastructure may be prohibitively expensive. That makes the technology particularly valuable for rural communities, ships, aircraft and areas affected by natural disasters or lacking conventional infrastructure.
Traditional telecom networks, meanwhile, have an advantage in densely populated areas where enormous amounts of data must be moved quickly and continuously.
Fiber provides a high-capacity backbone, while cellular networks can distribute that capacity through densely deployed towers and small cells.
The challenge for SpaceX is therefore whether its satellite network can evolve from a solution for places traditional networks struggle to reach into a system capable of matching their capacity in places where millions of users are already connected.
The next phase of the telecom fight
The disagreement is likely to intensify as SpaceX continues expanding Starlink and established carriers invest in their own networks.
For AT&T and T-Mobile, the argument is that physics, infrastructure costs and network capacity give terrestrial networks a lasting advantage.
For SpaceX, the rapid expansion of Starlink demonstrates that satellite technology is no longer confined to niche applications.
With 12 million subscribers, more than 10,200 satellites and coverage spanning 167 countries, Starlink has already moved far beyond the experimental stage.
The unresolved question is whether that scale can translate into a mobile network capable of challenging America's established wireless giants—or whether the limits identified by AT&T and T-Mobile will prevent Starlink from making the leap from satellite broadband provider to full-scale cellular competitor.