TURKCELL RECEIVES THANK YOU PLAQUE FROM TURKISH FOOTBALL FEDERATION Istanbul – Wednesday, August 16, 2006 – (NYSE:TKC, ISE:TCELL), Turkey’s leading GSM operator Turkcell, operating with the vision to increase qualified human capital in the country and the name sponsor of Turkish professional football league between 2005 and 2010, received a Thank You plaque along with Galatasaray SK, last season’s champions, from Turkish Football Federation. During a ceremony on August 13, 2006 Sunday, before a match between Galatasaray SK and Kayserispor at Ali Sami Yen stadium, Turkish Football Federation Chairman Haluk Ulusoy presented a “Support and Thank You” plaque to Turkcell Chief Marketing Officer Lale Saral Develioğlu for the company’s support to the whole of Turkish football via its sponsorship of Turkcell Super League. During a press conference after the ceremony, Lale Saral Develioğlu reminded that Turkcell would be the name sponsor for the League until 2010. Ms. Develioğlu also underlined that Turkcell’s sponsorship support for sports, especially football, had a social purpose and added: “We place a special importance on Turkcell Super League because we believe that as the quality of our league increases, it will become one of Europe’s top leagues and help boost the performance of our national teams and the Turkish National Football Team in the international arena. We aim to contribute to Turkish football’s future success stories. In order to make this happen, we are not only sponsors of Turkcell Super League but also the main sponsors of Turkish National Team as well as twelve Anatolian clubs. We believe that Ankaragucu, Ankaraspor, Antalyaspor, Bursaspor, Caykur Rizespor, Denizlispor, Gaziantepspor, Genclerbirligi, Kayserispor, Konyaspor, Sakaryaspor and Sivasspor will continue to add to most precious resource of football, qualified human capital.” www.turkcell.com.tr About Turkcell Turkcell is the leading GSM operator in Turkey with 29.8 million post-paid and pre-paid customers as of June 30, 2006 operating in a three player market with a market share of approximately 62% as of March 31, 2006 (Source: Telecommunication Authority). In addition to the 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 534 operators in 193 countries as of August 16, 2006. Serving a large subscriber base in Turkey with its high-quality wireless telephone network, Turkcell reported US$4,528 million net revenues as of December 31, 2005 (in accordance with International Financial Reporting Standards). 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, 13.29% by Cukurova Group, 13.07%, by Sonera Holding, 5.07% by M.V. Group and 0.01% by others while the remaining 17.56% is free float. Contact: Turkcell: Citigate Dewe Rogerson: Media: Toby Moore Bahar Erbengi, Corporate Communications Tel: +44 207 282 2999 Tel: + 90-212-313-2309 Email: [email protected] Email: [email protected] Doruk Arbay, Corporate Communications Tel: + 90-212-313-2319 Email: [email protected] Investors: Koray Ozturkler, Investor Relations Tel: +90-212-313-1500 Email: [email protected] Ferda Atabek, Investor Relations Tel: + 90-212-313-1275 Email: [email protected] [email protected] .