The Bank of New York 101 Barclay Street, 22nd Floor New York, NY 10286 Securities & Exchange Commission 450 Fifth Street, NW Washington, DC 20549 Attn.: Document Control RE: American Depositary Shares evidenced by American Depositary Receipts, each representing one-fifth of an Ordinary Share of Portugal Telecom, SGPS, S.A. (Form F-6 File No 333-81394) Ladies and Gentlemen: Pursuant to Rule 424(b)(3) under the Securities Act of 1933, as amended, on behalf of The Bank of New York, as Depositary for securities against which American Depositary Receipts are to be issued, we attach a copy of the new prospectus (Prospectus) reflecting the par value change of Portugal Telecom, SGPS, S.A., from one Eueo 1.00 each to Euro 1.30 each, effective May 12, 2006. As required by Rule 424(e), the upper right hand corner of the Prospectus cover page has a reference to Rule 424(b)(3) and to the file number of the registration statement to which the Prospectus relates. Pursuant to Section III. B. of the General Instructions to the Form F-6 Registration Statement, the Prospectus consists of the ADR certificate with revised par value of Euro 1.30 for Portugal Telecom, SGPS, S.A. The Prospectus has been revised to reflect the new par value by addition of the following notation: 12, 2006, the par value is Euro 1.30 per Ordinary Share. Please contact me with any questions or comments at 212 815-4244.