 ISTANBUL--BUSINESS WIRE--Turkcell NYSE: TKC, BIST: TCELL announced that it has filed its Annual Report on Form 20-F for the year ended December 31, 2020 with the United States Securities and Exchange Commission on April 26, 2021. The Companys Form 20-F and complete audited financial statements can be found at Hard copy versions of the complete audited financial statements are available free of charge upon request f 