Item 8.01. Other Matters.

On May 31, 2006, United States Cellular Corporation ("U.S. Cellular") issued a joint press release, together with its parent company, Telephone and Data Systems, Inc., disclosing that it does not expect to file its Annual Report on Form 10-K ("Form 10-K") for the year ended December 31, 2005 by May 31, 2006. The press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

As previously disclosed, U.S. Cellular determined to restate its financial results for each of the three years in the period ended December 31, 2004, including quarterly information for 2004 and 2003 and certain selected financial data for 2001 and 2000. U.S. Cellular also determined to restate its Quarterly Reports on Form 10-Q ("Form 10-Q") for the quarters ended March 31, 2005 and June 30, 2005. As a result, U.S. Cellular delayed the filing of its Form 10-Q for the quarter ended September 30, 2005. Such restatements and the Form 10-Q for the quarter ended September 30, 2005 were filed on April 26, 2006.

It was necessary for U.S. Cellular to complete and file the restatements and its Form 10-Q for the quarter ended September 30, 2005 before it could complete and file its Form 10-K for the year ended December 31, 2005. Such Form 10-K was due on March 16, 2006. Although a Form 12b-25 was timely filed by U.S. Cellular prior to March 17, 2006, U.S. Cellular indicated in such filing that it did not expect to file the Form 10-K for the year ended December 31, 2005 by the extended due date of March 31, 2006 and did not do so. U.S. Cellular now plans to file the Form 10-K for the year ended December 31, 2005 as soon as possible.

It was also necessary for U.S. Cellular to complete and file the restatements, its Form 10-Q for the quarter ended September 30, 2005 and its Form 10-K for the year ended December 31, 2005 before it could complete and file its Form 10-Q for the quarter ended March 31, 2006. Such Form 10-Q was due on May 10, 2006. Although a Form 12b-25 was timely filed with the SEC on May 11, 2006, U.S. Cellular indicated in such filing that it did not expect to file the Form 10-Q for the quarter ended March 31, 2006 by the extended due date of May 15, 2006 and it did not do so. U.S. Cellular plans to file the Form 10-Q for the quarter ended March 31, 2006 as soon as possible after its Form 10-K for the year ended December 31, 2005 is filed.

The restatements and the late filing of the Form 10-K for the year ended December 31, 2005 and Form 10-Q for the quarter ended March 31, 2006 resulted in defaults under the revolving credit agreement between U.S. Cellular and certain lenders and under certain forward contracts between a subsidiary of U.S. Cellular and a counterparty. Waivers of such defaults obtained previously were extended on May 31, 2006, provided that U.S. Cellular files its Form 10-K for the year ended December 31, 2005 and its Form 10-Q for the quarter ended March 31, 2006 by June 30, 2006. U.S. Cellular has not failed to make and does not expect to fail to make any scheduled payment of principal or interest under the revolving credit agreement or forward contracts.

The failure to file the Form 10-K for the year ended December 31, 2005 by May 31, 2006 continues the existing non-compliance under a debt indenture. In addition, the late filing of the Form 10-Q for the quarter ended March 31, 2006 resulted in non-compliance under such debt indenture. Nevertheless, this non-compliance will not result in events of default unless and until written notice thereof is delivered to U.S. Cellular by the trustee or sufficient holders of debt and, in any event, such events of default would be cured if U.S. Cellular files its Form 10-K for the year ended December 31, 2005 and/or its Form 10-Q for the quarter ended March 31, 2006, as applicable, within 90 days of any such notice. U.S. Cellular believes that it will be able to make all filings in sufficient time to avoid any event of default maturing into a default under any indenture. U.S. Cellular has not failed to make and does not expect to fail to make any scheduled payment of principal or interest under such indentures.

As previously disclosed, U.S. Cellular received a notice from the staff of the American Stock Exchange ("AMEX") indicating that U.S. Cellular was not in compliance with AMEX listing standards, due to the failure to file its Form 10-K for the year ended December 31, 2005 on a timely basis. The failure by U.S. Cellular to file its Form 10-Q for the quarter ended March 31, 2006 on a timely basis also resulted in non-compliance with the AMEX listing standards. However, as previously disclosed, the AMEX granted U.S. Cellular an extension until June 30, 2006 to regain compliance with AMEX listing standards. U.S. Cellular will regain compliance with the AMEX listing standards when it has filed with the SEC its Form 10-K for the year ended December 31, 2005 and its Form 10-Q for the quarter ended March 31, 2006 on or prior to June 30, 2006.

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In addition, as previously disclosed, U.S. Cellular is not in compliance with AMEX listing standards because U.S. Cellular has not distributed its annual report to shareholders by April 30, 2006. Accordingly, U.S. Cellular requested and obtained from the AMEX an extension until July 31, 2006 in order to provide additional time to complete and distribute its annual report to shareholders. U.S. Cellular will regain compliance with such AMEX listing standards when it has distributed its annual report to shareholders for the year ended December 31, 2005 on or prior to July 31, 2006.

Also as previously disclosed, U.S. Cellular received a notice from the staff of the New York Stock Exchange ("NYSE") indicating that U.S. Cellular was not in compliance with listing standards relating to its debt listed on the NYSE, due to the failure to file its Form 10-K for the year ended December 31, 2005 on a timely basis. Further, the failure by U.S. Cellular to file its Form 10-Q for the quarter ended March 31, 2006 on a timely basis also resulted in non-compliance with the NYSE listing standards. U.S. Cellular will regain compliance with the NYSE listing standards when it has filed with the SEC its Form 10-K for the year ended December 31, 2005 and its Form 10-Q for the quarter ended March 31, 2006.

Item 9.01. Financial Statements and Exhibits.

(d)      Exhibits:

        In accordance with the provisions of Item 601 of Regulation S-K, any Exhibits filed or furnished herewith are set forth on the Exhibit Index attached hereto.

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SIGNATURES

        Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereto duly authorized.

United States Cellular Corporation
(Registrant)

Date: June 5, 2006

EXHIBIT INDEX

The following exhibits are filed or furnished herewith as noted below.