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Wireless Licenses, Goodwill and Other Intangible Assets (Tables) | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Carrying Amount of Wireless Licenses | The carrying amounts of our Wireless licenses are as follows:
| At September 30, | At December 31,
(dollars in millions) | 2025 | 2024
Wireless licenses | $ | 156,926 |  | $ | 156,613 |
Changes in Carrying Amount of Goodwill | Changes in the carrying amount of Goodwill are as follows:
(dollars in millions) | Consumer |  | Business |  |  |  | Total
Balance at January 1, 2025(1) | $ | 21,177 |  |  | $ | 1,664 |  |  |  |  | $ | 22,841 |
Balance at September 30, 2025(1) | $ | 21,177 |  |  | $ | 1,664 |  |  |  |  | $ | 22,841 |
(1) Goodwill is net of accumulated impairment charges of $5.8 billion related to our Business reporting unit.
Composition of Other Intangible Assets, Net | The following table displays the composition of Other intangible assets, net as well as the respective amortization periods:
| At September 30, 2025 |  | At December 31, 2024
(dollars in millions) | Gross Amount |  | Accumulated Amortization |  | Net Amount |  | Gross Amount |  | Accumulated Amortization |  | Net Amount
Customer lists (6 to 13 years) | $ | 4,245 |  |  | $ | (2,997) |  |  | $ | 1,248 |  |  | $ | 4,242 |  |  | $ | (2,629) |  |  | $ | 1,613 |
Non-network internal-use software (3 to 7 years) | 28,460 |  |  | (20,126) |  |  | 8,334 |  |  | 28,136 |  |  | (19,743) |  |  | 8,393 |
Other (4 to 25 years) | 2,673 |  |  | (1,739) |  |  | 934 |  |  | 2,664 |  |  | (1,541) |  |  | 1,123 |
Total | $ | 35,378 |  |  | $ | (24,862) |  |  | $ | 10,516 |  |  | $ | 35,042 |  |  | $ | (23,913) |  |  | $ | 11,129 |
Amortization Expense for Other Intangible Assets | The amortization expense for Other intangible assets was as follows:
| Three Months Ended |  | Nine Months Ended
(dollars in millions) | September 30, |  | September 30,
2025 | $ | 749 |  |  | $ | 2,237 |
2024 | 676 |  |  | 2,080 |
Estimated Future Amortization Expense for Other Intangible Assets | The estimated future amortization expense for Other intangible assets for the remainder of the current year and next 5 years is as follows:
Years | (dollars in millions)
Remainder of 2025 | $ | 764 |
2026 | 2,864 |
2027 | 2,307 |
2028 | 1,779 |
2029 | 1,104 |
2030 | 843 |

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