Three Months Ended September 30, 2018 (in thousands) Wireless Cable Wireline Other Eliminations Consolidated External revenue Service revenue $ 96,299 $ 28,578 $ 5,443 $  $  $ 130,320 Equipment revenue 15,666 234 63   15,963 Other 2,871 2,104 7,473   12,448 Total external revenue 114,836 30,916 12,979   158,731 Internal revenue 1,263 1,266 6,643  (9,172 )  Total operating revenue 116,099 32,182 19,622  (9,172 ) 158,731 Operating expenses Cost of services 32,253 14,837 9,266 (12 ) (8,458 ) 47,886 Cost of goods sold 14,940 78 19 (1 )  15,036 Selling, general and administrative 11,191 5,331 1,780 9,864 (714 ) 27,452 Depreciation and amortization 30,363 6,102 3,435 128  40,028 Total operating expenses 88,747 26,348 14,500 9,979 (9,172 ) 130,402 Operating income (loss) $ 27,352 $ 5,834 $ 5,122 $ (9,979 ) $  $ 28,329 Three Months Ended September 30, 2017 (in thousands) Wireless Cable Wireline Other Eliminations Consolidated External revenue Service revenue $ 107,395 $ 26,934 $ 5,126 $  $  $ 139,455 Equipment revenue 1,742 219 33   1,994 Other 2,129 1,937 6,267   10,333 Total external revenue 111,266 29,090 11,426   151,782 Internal revenue 1,239 999 8,425  (10,663 )  Total operating revenue 112,505 30,089 19,851  (10,663 ) 151,782 Operating expenses Cost of services 33,825 14,858 9,796  (9,927 ) 48,552 Cost of goods sold 7,216 55 11   7,282 Selling, general and administrative 30,099 5,358 1,706 5,772 (736 ) 42,199 Acquisition, integration and migration expenses 1,691   15  1,706 Depreciation and amortization 32,929 6,192 3,249 198  42,568 Total operating expenses 105,760 26,463 14,762 5,985 (10,663 ) 142,307 Operating income (loss) $ 6,745 $ 3,626 $ 5,089 $ (5,985 ) $  $ 9,475 Nine Months Ended September 30, 2018 (in thousands) Wireless Cable Wireline Other Eliminations Consolidated External revenue Service revenue $ 284,154 $ 85,797 $ 16,052 $  $  $ 386,003 Equipment revenue 48,859 537 155   49,551 Other 6,897 6,276 20,643   33,816 Total external revenue 339,910 92,610 36,850   469,370 Internal revenue 3,746 3,394 21,591  (28,731 )  Total operating revenue 343,656 96,004 58,441  (28,731 ) 469,370 Operating expenses Cost of services 99,491 45,118 28,441  (26,688 ) 146,362 Cost of goods sold 45,749 197 61   46,007 Selling, general and administrative 35,693 14,940 5,183 32,344 (2,043 ) 86,117 Depreciation and amortization 95,853 18,305 10,069 405  124,632 Total operating expenses 276,786 78,560 43,754 32,749 (28,731 ) 403,118 Operating income (loss) $ 66,870 $ 17,444 $ 14,687 $ (32,749 ) $  $ 66,252 Nine Months Ended September 30, 2017 (in thousands) Wireless Cable Wireline Other Eliminations Consolidated External revenue Service revenue $ 323,262 $ 80,229 $ 15,301 $  $  $ 418,792 Equipment revenue 7,666 547 90   8,303 Other 7,467 5,736 18,622   31,825 Total external revenue 338,395 86,512 34,013   458,920 Internal revenue 3,707 2,153 24,568  (30,428 )  Total operating revenue 342,102 88,665 58,581  (30,428 ) 458,920 Operating expenses Cost of services 100,745 44,956 28,357  (28,314 ) 145,744 Cost of goods sold 17,084 96 52   17,232 Selling, general and administrative 88,201 15,083 5,065 19,139 (2,114 ) 125,374 Acquisition, integration and migration expenses 9,607   266  9,873 Depreciation and amortization 104,231 18,070 9,536 460  132,297 Total operating expenses 319,868 78,205 43,010 19,865 (30,428 ) 430,520 Operating income (loss) $ 22,234 $ 10,460 $ 15,571 $ (19,865 ) $  $ 28,400