 CHICAGO, Dec. 2, 2020 PRNewswire -- Telephone and Data Systems, Inc. NYSE: TDS and United States Cellular Corporation NYSE: USM are participating in a fireside chat hosted by UBS on Dec. 8, 2020 at 3:45 p.m. EST 2:45 p.m. CST. LeRoy T. Carlson Jr., President and CEO TDS; Douglas... 