On September 11, T-Mobile US rose 3.02% in regular trading, trading at $182.59/share, with turnover of $86.58 million. The rally was driven by the announcement that T-Mobile has become the first and only U.S. carrier to support Apple's newly unveiled iPhone Handoff feature.

Apple officially introduced the iPhone Handoff function as part of iOS 27 at its September 10 keynote event. The feature allows two iPhones to share the same phone number, covering calls, texts, mobile data, and T-Satellite connectivity. T-Mobile will charge a monthly fee of $5 for the service. The exclusive partnership positions T-Mobile with a meaningful competitive differentiator, potentially boosting subscriber acquisition and average revenue per user as customers seek access to the new functionality.

The announcement builds on a series of strategic developments for the company, including the completion of an 800 MHz spectrum transaction with Grain Management for $2.9 billion in cash, the expansion of its partnership with Optimum Communications, and the upcoming CFO transition with Jessica Uhl set to succeed Peter Osvaldik in February.

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