Turkey's mobile (cell) phone companies are Turkcell (900 Mhz, the largest), Vodafone (900 Mhz, next largest), and Türk Telekom (1800 Mhz, formerly Avea).

All of them also offer 2G and 3G (W-CDMA, 2100 Mhz) service, and 2G GPRS/EDGE and 3G data.A 4G LTE network is being constructed and may be in service by 2016, by which time it may actually be a 4.5G LTE network Wifi Internet access, usually free, is common all over Turkey. Virtually all hotels, hostels, dorms, rental apartments, and even tree houses have Wifi. Only the luxury hotels charge for it. Many restaurants, cafés, bars, beach café-bars andoffices offer it. Some intercity buses, trains andferryboats have it, and airports offer it for a fee

It's fair to say that you will have free Wifi available to you at least a few hours each day. Some travelers find this completely sufficient for their needs. The connection and its speed may vary, but you'll have the opportunity to connect, and the price is the best: free!