The information required by CVM Instruction No. 319/99 will be disclosed in the form of Material Facts by the time of the same date as the call notice of the Oi shareholders meeting that will deliberate on the Merger of Shares.The Memorandum of Understanding will remain in force until October 1, 2014 and may be extended by the parties thereto. Oi will keep its shareholders and the market informed of any subsequent material events related to Transactions. Rio de Janeiro, October 2, 2013. OI S.A. Bayard de Paoli GontijoInvestor Relations Officer Additional Information and Where to Find It: This communication is not an offering document and does not constitute an offer to sell or the solicitation of an offer to buy any securities or a solicitation of any vote or approval in any jurisdiction in which distribution of an offering document or such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of that jurisdiction. This communication contains information with respect to (1) the proposed capital increase and related public offering of common shares and preferred shares by Oi, (2) the proposed merger of shares ( incorporacao de acoes) between CorpCo and Oi, and (3) the proposed merger ( incorporacao) of Portugal Telecom with and into CorpCo. Oi may file a registration statement (including a prospectus) with the U.S. Securities and Exchange Commission (the "SEC") for the offering of its common shares and preferred shares to be issued in connection with its proposed capital increase. Before you invest, you should read the prospectus in that registration statement and other documents Oi has filed with the SEC for more complete information about Oi and this offering. You may get these documents for free by visiting EDGAR on the SEC Web site at www.sec.gov. Alternatively, Oi will arrange to send you the prospectus after filing if you request it by calling toll-free 1-855-672-2332. In connection with the proposed merger of shares between CorpCo and Oi and the proposed merger of Portugal Telecom with and into CorpCo, CorpCo plans to file with the SEC (1) one or more registration statements on Form F-4, containing a prospectus or prospectuses which will be mailed to shareholders of Oi and/or Portugal Telecom, as applicable (other than non-U.S. persons as defined in applicable rules of the SEC), and (2) other documents regarding this proposed merger.