| T-Mobile US, Inc. |
| Q4-CY2025 | Q3-CY2025 | Q2-CY2025 | Q1-CY2025 | Q4-CY2024 | Q3-CY2024 | Q2-CY2024 | Q1-CY2024 | Q4-CY2023 | Q3-CY2023 | Q2-CY2023 | Q1-CY2023 | Q4-CY2022 | Q3-CY2022 | Q2-CY2022 | Q1-CY2022 | Q4-CY2021 | Q3-CY2021 | Q2-CY2021 | Q1-CY2021 | Q4-CY2020 | Q3-CY2020 | Q2-CY2020 | Q1-CY2020 | Q4-CY2019 | Q3-CY2019 | Q2-CY2019 | Q1-CY2019 | Q4-CY2018 | Q3-CY2018 | Q2-CY2018 | Q1-CY2018 | Q4-CY2017 | Q3-CY2017 | Q2-CY2017 | Q1-CY2017 | Q4-CY2016 | Q3-CY2016 | Q2-CY2016 | Q1-CY2016 | Q4-CY2015 | Q3-CY2015 | Q2-CY2015 | Q1-CY2015 | Q4-CY2014 | Q3-CY2014 | Q2-CY2014 | Q1-CY2014 | Q4-CY2013 |
| Balance Sheet Date | | | 2025-Jun-30 | 2025-Mar-31 | 2024-Dec-31 | 2024-Sep-30 | 2024-Jun-30 | 2024-Mar-31 | 2023-Dec-31 | 2023-Sep-30 | 2023-Jun-30 | 2023-Mar-31 | 2022-Dec-31 | 2022-Sep-30 | 2022-Jun-30 | 2022-Mar-31 | 2021-Dec-31 | 2021-Sep-30 | 2021-Jun-30 | 2021-Mar-31 | | 2020-Sep-30 | 2020-Jun-30 | | 2019-Dec-31 | 2019-Sep-30 | 2019-Jun-30 | 2019-Mar-31 | 2018-Dec-31 | 2018-Sep-30 | 2018-Jun-30 | 2018-Mar-31 | 2017-Dec-31 | 2017-Sep-30 | 2017-Jun-30 | 2017-Mar-31 | 2016-Dec-31 | 2016-Sep-30 | 2016-Jun-30 | 2016-Mar-31 | 2015-Dec-31 | 2015-Sep-30 | 2015-Jun-30 | 2015-Mar-31 | 2014-Dec-31 | 2014-Sep-30 | 2014-Jun-30 | 2014-Mar-31 | 2013-Dec-31 |
| Fiscal Period | | | Q2-FY2025 | Q1-FY2025 | Q4-FY2024 | Q3-FY2024 | Q2-FY2024 | Q1-FY2024 | Q4-FY2023 | Q3-FY2023 | Q2-FY2023 | Q1-FY2023 | Q4-FY2022 | Q3-FY2022 | Q2-FY2022 | Q1-FY2022 | Q4-FY2021 | Q3-FY2021 | Q2-FY2021 | Q1-FY2021 | | Q3-FY2020 | Q2-FY2020 | | Q4-FY2019 | Q3-FY2019 | Q2-FY2019 | Q1-FY2019 | Q4-FY2018 | Q3-FY2018 | Q2-FY2018 | Q1-FY2018 | Q4-FY2017 | Q3-FY2017 | Q2-FY2017 | Q1-FY2017 | Q4-FY2016 | Q3-FY2016 | Q2-FY2016 | Q1-FY2016 | Q4-FY2015 | Q3-FY2015 | Q2-FY2015 | Q1-FY2015 | Q4-FY2014 | Q3-FY2014 | Q2-FY2014 | Q1-FY2014 | Q4-FY2013 |
| Operating Cash Flow | | | 6,992,000,000$ | 6,847,000,000$ | 5,549,000,000$ | 6,139,000,000$ | 5,521,000,000$ | 5,084,000,000$ | 4,859,000,000$ | 5,294,000,000$ | 4,355,000,000$ | 4,051,000,000$ | 4,336,000,000$ | 4,391,000,000$ | 4,209,000,000$ | 3,845,000,000$ | 3,000,000,000$ | 3,477,000,000$ | 3,779,000,000$ | 3,661,000,000$ | | 2,772,000,000$ | 777,000,000$ | | 1,537,000,000$ | 1,748,000,000$ | 2,147,000,000$ | 1,392,000,000$ | 954,000,000$ | 914,000,000$ | 1,261,000,000$ | 770,000,000$ | 865,000,000$ | 1,252,000,000$ | 1,106,000,000$ | 608,000,000$ | (1,754,000,000$) | 1,740,000,000$ | 1,768,000,000$ | 1,025,000,000$ | 2,233,000,000$ | 1,531,000,000$ | 1,161,000,000$ | 489,000,000$ | 1,355,000,000$ | 1,062,000,000$ | 970,000,000$ | 759,000,000$ | 1,004,000,000$ |
| Investing Cash Flow | | | (1,559,000,000$) | (3,409,000,000$) | (2,300,000,000$) | (3,307,000,000$) | (1,678,000,000$) | (1,787,000,000$) | (1,221,000,000$) | (1,393,000,000$) | (1,487,000,000$) | (1,728,000,000$) | (2,153,000,000$) | (2,555,000,000$) | (2,559,000,000$) | (5,092,000,000$) | (1,912,000,000$) | (4,152,000,000$) | (2,083,000,000$) | (11,239,000,000$) | | (1,132,000,000$) | (6,356,000,000$) | | (887,000,000$) | (657,000,000$) | (1,615,000,000$) | (966,000,000$) | 231,000,000$ | (42,000,000$) | (306,000,000$) | (462,000,000$) | 267,000,000$ | (345,000,000$) | (6,251,000,000$) | (416,000,000$) | 2,062,000,000$ | (1,859,000,000$) | (667,000,000$) | (1,860,000,000$) | (4,322,000,000$) | (1,209,000,000$) | (1,337,000,000$) | (2,692,000,000$) | (1,806,000,000$) | (1,165,000,000$) | (3,310,000,000$) | (965,000,000$) | (1,224,000,000$) |
| Financing Cash Flow | | | (7,205,000,000$) | 3,193,000,000$ | (7,522,000,000$) | 507,000,000$ | (4,134,000,000$) | (1,666,000,000$) | (3,530,000,000$) | (5,510,000,000$) | (784,000,000$) | (2,273,000,000$) | (4,498,000,000$) | 1,927,000,000$ | (1,744,000,000$) | (2,136,000,000$) | 1,472,000,000$ | (3,060,000,000$) | (577,000,000$) | 3,874,000,000$ | | (6,144,000,000$) | 15,628,000,000$ | | (775,000,000$) | (543,000,000$) | (866,000,000$) | (190,000,000$) | (311,000,000$) | (758,000,000$) | (3,267,000,000$) | 1,000,000,000$ | (652,000,000$) | (349,000,000$) | (2,175,000,000$) | 1,809,000,000$ | (160,000,000$) | (67,000,000$) | 790,000,000$ | (100,000,000$) | 4,038,000,000$ | (331,000,000$) | (214,000,000$) | (80,000,000$) | (21,000,000$) | 2,810,000,000$ | (51,000,000$) | (214,000,000$) | 3,746,000,000$ |
| End Cash Position | | | 10,259,000,000$ | 12,003,000,000$ | 5,409,000,000$ | 9,754,000,000$ | 6,417,000,000$ | 6,708,000,000$ | 5,135,000,000$ | 5,030,000,000$ | 6,647,000,000$ | 4,540,000,000$ | 4,507,000,000$ | 6,888,000,000$ | 3,151,000,000$ | 3,245,000,000$ | 6,631,000,000$ | 4,055,000,000$ | 7,793,000,000$ | 6,677,000,000$ | | 6,571,000,000$ | 11,076,000,000$ | | 1,528,000,000$ | 1,653,000,000$ | 1,105,000,000$ | 1,439,000,000$ | 1,203,000,000$ | 329,000,000$ | 215,000,000$ | 2,527,000,000$ | 1,219,000,000$ | 739,000,000$ | 181,000,000$ | 7,501,000,000$ | 5,500,000,000$ | 5,352,000,000$ | 5,538,000,000$ | 3,647,000,000$ | 4,582,000,000$ | 2,633,000,000$ | 2,642,000,000$ | 3,032,000,000$ | 5,315,000,000$ | 5,787,000,000$ | 3,080,000,000$ | 5,471,000,000$ | 5,891,000,000$ |
| Exchange Rate Effect | | | 13,000,000$ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| Dividends Paid | | | 996,000,000$ | 1,003,000,000$ | 1,014,000,000$ | 758,000,000$ | 759,000,000$ | 769,000,000$ | | | | | | | | | | | | | | | | | | | | | 0$ | 0$ | 0$ | 0$ | 14,000,000$ | 13,000,000$ | 14,000,000$ | 14,000,000$ | 14,000,000$ | 13,000,000$ | 14,000,000$ | 14,000,000$ | 14,000,000$ | 13,000,000$ | 14,000,000$ | 14,000,000$ | 0$ | 0$ | | | 0$ |