Turkcell Communication Services) (BİST: TCELL, NYSE: TKC) is the leading mobile phone operator of Turkey,[4] based in Istanbul.

It has 9.6 million subscribers via Fintur Holdings and its affiliates in partnership with TeliaSonera in Azerbaijan, Kazakhstan, Georgia and Moldova, as of 30 September 2007.

[12] In 2015, Turkcell completed the acquisition of a 44.96% stake in Ukrainian mobile phone operator Life :)[13] It had 13.6 million subscribers at that time.

It also applies discounted roaming costs when calling from a Turkcell mobile to a KKTurkcell number.

Turkcell has also continued to sponsor the CeBIT Bilişim Eurasia event,[17] one of the major information technology fairs in Europe, for the tenth time in 2007.

The project received international recognition in June 2001, when it won the UK "Institute of Public Relations Excellence Award" and the "Crystal Obelisk Award" from the Foundation of Women Executives in Public Relations in New York City in 2002.

This event was described as the first evidence of traffic monitoring and manipulation in Turkey with deep packet inspection.

[18][19] In May 2013, Turkcell dropped its multibillion-dollar US lawsuit against MTN Group, citing a US Supreme Court ruling that hurt its case.

The operator filed a $4.2 billion lawsuit in Washington in 2012 alleging the company used bribery to win a mobile license in Iran that was first awarded to Turkcell.