Türk Telekom
Mobile operator company
TT Mobil İletişim Hizmetleri A.Ş, currently operating under the Türk Telekom brand, is the sole GSM 1800 mobile operator of Turkey, was founded in 2004, and has reached a nationwide customer base of 17 million as of September 30, 2015. Wikipedia
Customer service: 011 90 4441444
CEO: Ümit Önal (Jul 31, 2019–)
Founded: February 19, 2004, Ankara, Türkiye
Headquarters: İstanbul, Türkiye
Parent organization: Türk Telekom