The main sponsor to twelve football clubs in the Turkcell Super League is Turkcell A supporter of the football clubs in the Professional League since 2003, Turkcell has now become the Main Sponsor to twelve clubs to compete in the Turkcell Super League during the 2007-2008 season. Istanbul – Friday, 10 August, 2007 – (NYSE:TKC, ISE:TCELL), Turkey’s leading communications and technology company Turkcell, which develops projects in order to contribute to the development of sports in our country, supports football and basketball by means of sponsorships to help ensure that the achievements of Turkish sportsmen and sportswomen are made to continue into the future and rendered permanent. Maintaining its sponsorship agreements with the football clubs Ankaragücü, Ankaraspor, Bursaspor, Çaykur Rizespor, Denizlispor, Gaziantepspor, Gençlerbirliği, Kayserispor, Konyaspor, and Sivasspor which competed in the Turkcell Super League last season, Turkcell has become the Main Sponsor to Gençlerbirliği Oftaşspor and Kasımpaşaspor which joined the Turkcell Super League for the first time this year. Turkcell’s goal in these sponsorships is to build up sportsmanlike competition by helping to raise the number of the “Big Four” to the “Big Many” so that Turkish sports can enjoy even greater achievements in the days to come. Turkcell has been the Main Sponsor to the Turkish Football Federation and the National Teams since 2002. Having acquired the name sponsorship of the Turkey Professional Super League for five years starting with the 2005-2006 season, Turkcell supports Turkish sports by serving as the Main Sponsor to the Turkish National Football and Basketball Teams. Turkcell has also given its name to the facilities of the National Teams at Riva under an agreement concluded with the Turkish Football Federation. www.turkcell.com.tr / www.turkcellsuperlig.com.tr ABOUT TURKCELL Turkcell is the leading GSM operator in Turkey with 33.8 million postpaid and prepaid customers as of June 30, 2007 operating in a three player market with a market share of approximately 59% as of March 31, 2007 (Source: The Telecommunications Authority). In addition to high-quality wireless telephone services, Turkcell currently offers General Packet Radio Service (“GPRS”) countrywide and Enhanced Data Rates for GSM Evolution (“EDGE”) in dense areas, which provide for both improved data and voice services. Turkcell provides roaming with 556 operators in 194 countries as of August 7, 2007. Serving a large subscriber base in Turkey with its high-quality wireless telephone network, Turkcell reported US$2,798 million net revenues for the six months ended June 30, 2007 and US$4,700 million net revenues for the year ended December 31, 2006 as per IFRS financial statements. Turkcell has interests in international GSM operations in Azerbaijan, Georgia, Kazakhstan, Moldova, Northern Cyprus and Ukraine. Turkcell has been listed on the NYSE (“New York Stock Exchange”) and the ISE (“Istanbul Stock Exchange”) since July 2000 and is the only NYSE listed company in Turkey. 51.00% of Turkcell’s share capital is held by Turkcell Holding, 4.22% by Cukurova Group, 13.07% by Sonera Holding, 4.07% by M.V. Group and 0.01% by others while the remaining 27.63% is free float. .