Elon Musk‘s $100 trillion Space Exploration Technologies Corp. (NASDAQ:SPCX) forecast needs more than rockets reaching orbit and satellites connecting remote homes.

One potentially larger opportunity is turning Starlink into a mobile connectivity business that can reach ordinary smartphones, opening a market far bigger than satellite broadband alone. But the economics of that expansion, not the size of the opportunity, will determine how much it adds to SpaceX’s valuation.

Starlink Wants a Bigger Wireless Market

SpaceX is moving beyond its traditional satellite internet model. On Oct. 8, the company agreed to acquire a nationwide low-band spectrum portfolio from Grain Management for approximately $8 billion.

The 800-megahertz spectrum could help Starlink Mobile deliver signals over longer distances and penetrate buildings more effectively. Combined with its existing spectrum and satellite network, it could give SpaceX a path toward competing more directly with conventional wireless carriers rather than relying exclusively on partnerships to extend their coverage.

That is a potentially important shift in the business model. Satellite broadband requires specialized equipment, while direct-to-cell services aim to connect compatible smartphones.

A successful mobile offering could expand Starlink’s addressable market, although network capacity, service quality and regulatory approvals will determine how quickly it can scale.

India’s Millions-User Opportunity

India illustrates the potential reach. The country had approximately 1.27 billion wireless mobile subscriptions at the end of March 2026, according to the Department of Telecommunications.

If Starlink eventually captured just 2% of that subscription base, it would serve roughly 25 million connections. At a hypothetical 100 Indian rupees (~$1.05) per month received by SpaceX for each connection, that would generate approximately 30 billion rupees, or $350 million, in annual revenue at about INR 86 per dollar.

A 5% share would mean about 63 million connections and approximately $880 million in annual revenue under the same assumptions. These are illustrative scenarios, not forecasts: Starlink has not announced an Indian direct-to-cell price, and its share of customer payments would depend on its commercial arrangements.

India also presents a regulatory hurdle. Reuters reported on Oct. 11 that Musk had promised affordable Starlink pricing, but satellite internet availability does not automatically authorize direct-to-cell services.

The $100 Trillion Valuation Test

Even the bullish Indian scenario produces less than $1 billion in annual revenue for SpaceX. That is meaningful, but insufficient by itself to explain Musk’s extraordinary valuation target.

The broader case depends on Starlink scaling globally, AI infrastructure generating substantial earnings and Starship potentially lowering launch costs enough to unlock new businesses. India’s mobile market is one possible contributor, not proof of the end valuation.

What SpaceX Investors Should Watch

Investors should watch whether SpaceX can turn spectrum investment into paying mobile subscribers, expand beyond existing carrier partnerships and generate attractive margins after network costs.

The $100 trillion ambition requires multiple businesses to scale dramatically; Starlink Mobile could help, but execution will matter far more than the headline market size.

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