UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 Report on Form 6-K dated March 31, 2022 Commission File Number: 001-15092 TURKCELL ILETISIM HIZMETLERI A.S. Yes ¨ No x (Translation of registrant's name in English) Aydınevler Mahallesi İnönü Caddesi No:20 Küçükyalı Ofispark 34854 Maltepe Istanbul, Turkey (Address of Principal Executive Offices) Indicate by check mark wh ...