Cellular or their subsidiaries. Mayer Brown LLP from time to time acts as counsel in certain matters for U.S. Cellular, TDS or their subsidiaries. Debora de Hoyos, wife of Walter M. Carlson, is a partner of Mayer Brown LLP. S-31 EFTA00690321 $500,000,000 cr. US. Cellular UNITED STATES CELLULAR CORPORATIO