From a foreign country, it is generally necessary to dial 00 and
90 to reach Netherlands and
212/216 for Istanbul. Turkcell is the leading GSM
operator in Turkey with 22.3 million post and prepaid customers as of 2004 Q3.
It provides roaming with 373 operators in 158 countries. Other GSM operators in
Turkey include Telsim and Avia.
Contact details of the key GSM providers in Turkey are listed below:
Avea
Tel: 4441500, website: avea.com.tr
Telsim/Vodafone
Tel: 4440542, website: http://www.vodafone.com.tr/
Türkcell
Tel: 4440532, website: http://www.turkcell.com.tr/