After 3 years as being brand manager in agency side, Hakan Senbir was so fortunate working for TURKCELL launch campaign.  The main concern was to communicate that GSM card had been the main component to make one speak. Thus, he wrote "Not without TURKCELL" strategy and TURKCELL become leader in it's route. The motto of this strategy was so clear and used nearly 7 years: TURKCELL. Turkey's Mobile Phone Card.