EXHIBIT 11 TELEPHONE AND DATA SYSTEMS, INC. COMPUTATION OF EARNINGS PER COMMON SHARE YEAR ENDED DECEMBER 31, 1997 (IN THOUSANDS, EXCEPT PER SHARE AMOUNTS) Net (Loss)....................................................................... $ (9,549) Less: Preferred Dividends........................................................ (1,892) --------- Net (Loss) Available to Common used in Earnings per Share--Basic................. $ (11,441) Minority Income Adjustment....................................................... (100) --------- Net (Loss) Available to Common used in Earnings per Share--Diluted............... $ (11,541) --------- --------- Weighted average number of Common and Series A Common Shares Used in Earnings per Share--Basic................................................................... 60,211 Effect of Dilutive Securities: Common Shares outstanding if Preferred Shares converted........................ -- Stock Options and Stock Appreciation Rights.................................... -- Common Shares Issuable......................................................... -- --------- Weighted average number of Common and Series A Common Shares Used in Earnings per Share--Diluted................................................................. 60,211 --------- --------- Earnings per Common Share--Basic................................................. $ (.19) --------- --------- Earnings per Common Share--Diluted............................................... $ (.19) --------- --------- Note: The minority income adjustment reflects the additional minority share of U.S. Cellular's income computed as if all of U.S. Cellular's issuable securities were outstanding. 85