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Wireless Licenses, Goodwill and Other Intangible Assets | 9 Months Ended
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Sep. 30, 2025
Goodwill and Intangible Assets Disclosure [Abstract] |
Wireless Licenses, Goodwill, and Other Intangible Assets |
Note 4. Wireless Licenses, Goodwill, and Other Intangible Assets
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 |
At September 30, 2025 and 2024, approximately $7.9 billion and $11.3 billion, respectively, of wireless licenses were under development for commercial service for which we were capitalizing interest costs. We recorded $338 million and $485 million of capitalized interest on wireless licenses for the nine months ended September 30, 2025 and 2024, respectively. During the nine months ended September 30, 2025, we renewed various wireless licenses in accordance with FCC regulations. The average renewal period for these licenses was 10 years. 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. Other Intangible Assets 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 |
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 |
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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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-20/tableOfContent + Details
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