TT&TİM İletişim Hizmetleri A.Ş. was officially established on February 19, 2004 as a consequence of the merger between Aycell, Türk Telekom's GSM Operator and İş-TİM which has been established through the partnership of İş Bankası Group with a share of 51% and Telecom Italia Mobile with a share of 49%. Following the merger, for a period Aria and Aycell brands existed under TT&TİM. A totally new brand "Avea", reflecting the synergy from the merger was introduced into the market on June 23, 2004. The business name "TT&TİM İletişim Hizmetleri A.Ş" was replaced with "Avea İletişim Hizmetleri A.Ş." as of October 15, 2004.