1) Turkish brand 
Turkcell ({Istanbul Stock Exchange|TCELL}, {nyse|TKC}) is the leading mobile phone operator of Turkey, based in Istanbul. The company has 34.4 million subscribers as of September 30, 2011. == Company background == In February 1994, Turkcell started Turkey`s first GSM network. As Q3 2012, it has a market share of 52,4%. Its competitors are Vodafon....