Turkcell İletişim Hizmetleri A.Ş. is the leading mobile phone operator of Turkey, based in Istanbul. The company has 39.3 million subscribers as of September 2021. In 2015, the company's number of subscribers climbed to 68.9 million, in nine countries. The largest shareholder is Turkey Wealth Fund with 26.2% ownership. It is one of the world's biggest companies list published by Fortune. Turkcell has also developed Yaani, a browser for mobile and desktop. Turkcell's general manager is Ali Taha Koç. Wikipedia