EXHIBIT 99.1Agreement Regarding Joint Filing Under • February 12th, 2007 • Renaissance Technologies Corp • American depositary receipts
In accordance with Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, each of the undersigned agrees to the filing on behalf of each of a Statement on Schedule 13G, and all amendments thereto, with respect to American Depositary Shares, representing Series B Preferred Shares of Nortel Inversora S.A.
