T-Mobile US Flexes Its Muscles as Deutsche Telekom Weighs a $300 Billion Merger Gamble

T-Mobile US adds 217K postpaid phone customers, lifts full-year outlook. Parent Deutsche Telekom explores potential $300B merger with US unit, facing regulatory and political hurdles.

T-Mobile US delivered a robust first-quarter performance on Tuesday, adding 217,000 postpaid phone customers and raising its full-year subscriber guidance. The US wireless carrier now expects net additions of between 950,000 and 1.05 million customers for 2026, up from its prior forecast of 900,000 to one million. The upgrade came alongside an improved outlook for adjusted core earnings, which the company now projects at $37.1 billion to $37.5 billion for the year.

Service revenue climbed 11% to $18.8 billion, fueled by a shift toward premium plans. Roughly 60% of new subscribers opted for higher-tier tariffs, boosting average revenue per user. The stock responded positively, gaining nearly 1.8% in US trading.

The strong numbers arrive at a pivotal moment for parent company Deutsche Telekom. Reports have emerged that the Bonn-based group is exploring a full merger with its US subsidiary — a deal that would create a transatlantic telecoms giant valued at roughly $300 billion, potentially the largest M&A transaction in history. Deutsche Telekom currently holds just over 53% of T-Mobile US, and the American unit already accounts for more than half of the parent’s market value.

Under one scenario being examined, the merger would be structured as an all-share exchange, with a new holding company listed in both Europe and the US. The structure echoes the 2018 combination of Linde and Praxair, with a European domicile outside Germany under consideration. A Deutsche Telekom spokesperson declined to comment on the speculation.

The political implications are significant. The German state and development bank KfW together own roughly a quarter of Deutsche Telekom’s shares. A full merger would dilute that stake, potentially pushing it below the 25% blocking minority threshold. Any capital increase would require broad shareholder approval, adding another layer of complexity.

Analysts are divided on the prospects. Deutsche Bank sees advantages in easier access to US capital markets for future acquisitions, while Bernstein Research warns of formidable regulatory obstacles. Without a substantial valuation premium, US shareholders are unlikely to support the plan, the latter cautioned.

Back in Frankfurt, the reaction to T-Mobile US’s quarterly update was muted at best. Deutsche Telekom shares slipped 0.41% to €26.76 on Tuesday, leaving them nearly 22% below their 52-week high of €34.25. The stock has shed roughly 4% since the start of the year, with traders pointing to technical corrections and broader market uncertainty as headwinds.

Adding to the pressure at home, labour unrest is escalating. Trade union Verdi dramatically expanded its warning strikes on Tuesday, with over 3,000 employees in northern and eastern Germany walking off the job. Further walkouts are planned for Wednesday in North Rhine-Westphalia, Saxony, Saxony-Anhalt and Thuringia. The union is demanding a 6.6% pay increase for roughly 60,000 tariff employees over 12 months, plus an annual member bonus of €660.

The second round of negotiations on April 27 yielded no offer from the employer side. The strikes have already caused noticeable disruptions to customer service and fibre-optic expansion. The next bargaining session is scheduled for May 11-12 in Potsdam, leaving the cost impact on the domestic business uncertain.

Deutsche Telekom will release its own quarterly results in May, with management targeting adjusted core earnings of around €47 billion and free cash flow of nearly €20 billion for the current year. Those figures will need to demonstrate that the European core business remains on track, regardless of the merger fantasies swirling across the Atlantic.