Related-party disclosures

The following significant changes to the related-party disclosures reported in the consolidated financial statements as of December 31, 2024 were in effect as of June 30, 2025:

Acquisition of Lumos in the United States. T‑Mobile US’ investment in the fiber-to-the-home platform Lumos under a joint venture has been included in the consolidated financial statements using the equity method since April 1, 2025. Business relationships exist between T‑Mobile US and Lumos involving revenues, expenses, receivables, and liabilities.

For further information on the acquisition of Lumos, please refer to the section “Changes in the composition of the Group and other transactions.”