AN IMPORTANT UPDATE FOR OUR FELLOW COMMON STOCKHOLDERS OF TELEPHONE AND DATA SYSTEMS, INC. We wish to update you with respect to certain important developments relating to the April 27, 1998 Special Meeting of Telephone and Data Systems, Inc. ("TDS") and again urge you to JUST VOTE AGAINST the reincorporation proposal. 1. INSTITUTIONAL SHAREHOLDER SERVICES RECOMMENDS THAT SHAREHOLDERS "VOTE AGAINST" THE REINCORPORATION PROPOSAL! On April 14, 1998, Institutional Shareholder Services ("ISS") issued its recommendation that TDS Common Stockholders vote AGAINST the reincorporation proposal. ISS is the world's leading provider of proxy voting and corporate governance services. It serves more than 500 institutional and corporate clients. The recent commitment by TDS to propose to restore class voting rights did not alter the recommendation. 2. THE REINCORPORATION PROPOSAL PERPETUATES CONTROL! The reincorporation proposal is largely about perpetuation of control. We believe that the only reason for the proposal to be structured in this way is due to the fact that the Carlson family and voting trust are down to about 53% voting control and they cannot issue much more Common Stock without jeopardizing such control. As ISS said in its report recommending voting against the proposal: "...[T]here is often an element of control involved in their [tracking stock] use, and this proposal is unfortunately all about control." We think the Carlson's are intent on issuing Tracking Stock because it allows them to grow without risking control. Stockholders should force them to make that choice, which may lead them to realize some of the "hidden value" in TDS. Voting AGAINST this transaction could help to eliminate the "Carlson discount." 3. AERIAL COMMUNICATIONS SPECIAL COMMITTEE REJECTS TDS's TRACKING STOCK PROPOSAL; U.S. CELLULAR SPECIAL COMMITTEE HAS "SIGNIFICANT RESERVATIONS"! The reincorporation of TDS and issuance of Tracking Stock is not contingent on the subsidiary roll-up mergers. Aerial Communications announced on April 15th that a Special Committee of its board of directors determined to recommend that its board REJECT the proposal from TDS to acquire all of the publicly held Aerial Common Shares in exchange for shares of Tracking Stock. The Special Committee of U.S. Cellular has also informed TDS that it has "significant reservations" about the proposal. TDS management has stated that it may proceed with the tracking stock distributions if the roll-up mergers do not occur and distribute shares of Aerial and U.S. Cellular Tracking Stock to TDS stockholders. ISS observed in its report that this scenario "would create a valuation nightmare for both types of shares, which even TDS's own financial advisors did not touch." ISS's concerns about the consequences of such situation have been echoed by Goldman Sachs, Bear Stearns, and others in public writings. Further, the opinions of TDS's financial advisors included in its proxy statement are dependent on the occurrence of subsidiary roll-up transactions on the terms set forth in the Proxy Statement. Do such opinions now have any value? JUST VOTE AGAINST! We believe these latest developments further support our belief that the reincorporation proposal will hurt the TDS Common Stockholders. JUST VOTE AGAINST the reincorporation proposal.