AT&T is walking away from a decade-long Mexican campaign with a $2 billion exit cheque, selling its local unit to Grupo Televisa and Fintech Holdings in a 50-50 split. The US carrier confirmed the deal this week, drawing a line under an entry it once paid $4.4 billion to construct.

The buyer pairing matters. Televisa, paired with Fintech Holdings, takes equal control of AT&T Mexico, which ends 2025 with 24.7 million wireless subscribers and roughly 16% market share. That is small beer next to Carlos Slim's America Movil, whose Telcel brand sits on around 58% of the country.

Why did AT&T bet on Mexico in the first place?

Back in 2015, sweeping regulatory reform cracked open a market long dominated by a single incumbent. AT&T paid $4.4 billion for Iusacell and Nextel, merged them under the AT&T Mexico banner, and tried to build a second network that could credibly challenge Slim's empire. The math never quite worked. Ten years in, 16% is the trophy.

Chairman and CEO John Stankey framed the exit as strategy, not surrender. He said AT&T had "articulated a strong belief that the AI future will run on converged networks and dense fibre assets," and added: "This move positions AT&T Mexico to participate in that evolution and is consistent with our long-term strategy to focus our capital allocation on opportunities for growth in the vibrant US market." The phrase "vibrant US market" does a lot of work in that sentence.

What does Televisa actually get?

A quad-play first. The deal makes Televisa the only operator in Mexico offering mobile, internet, pay-TV and fixed line under one roof. That convergence angle is not accidental. Stankey's fibre-and-AI framing is aimed squarely at Wall Street rather than Mexico City.

For AT&T, the maths is simpler still. It paid $4.4 billion a decade ago. It recovers roughly $2 billion now. That is a steep paper loss, though the operator is unlikely to break out the impairment in a way that surprises analysts. The capital, Stankey hinted, heads north to fibre and 5G.

How does this reshape Mexico's mobile map?

America Movil's grip loosens not at all. Telcel's 58% share looks untouched by this transaction. AT&T's 24.7 million subscribers simply change hands.

Telefonica also recently left the building, offloading its Mexico unit in April for $450 million to a consortium of investors. Mexico's mid-tier is now a Televisa-Fintech bet plus a handful of MVNOs. Foreign incumbents have stopped pretending they can crack Slim's stronghold.

When does it close?

Regulators need to sign off the deal, which AT&T expects in the first quarter of 2027. That gives competition lawyers eighteen months to comb through spectrum, wholesale access, and any conditions attached to Televisa's newly minted mobile licence.

Where does the cash go?

AT&T's stated priority is US fibre and wireless. The operator has been rebuilding a domestic fibre footprint and leaning into 5G mid-band deployment. The Mexico exit frees roughly $2 billion of balance sheet weight, plus whatever annual opex the unit carried. It is not a windfall; it is a redirection.

AT&T claimed "meaningful progress" on US fibre and wireless in its statement. Whether shareholders agree depends on the next capex print. Stankey would rather fund fibre than fight Slim.

Look for the closing in Q1 2027, barring regulatory friction. After that, AT&T's Mexico chapter closes, and the US fibre chequebook stays open.