Turkcell is one of the largest and most famous GSM operators in Turkey.
And it is more expensive than others.
Yet Vodafone is an international and known company.
Coverage of all the three operators is about 99% of Turkey.
Thus, you will not have any problem with any of them in the destinations you wrote.
We used Avea in Capadocia and it was okay.
Plus: Turkey's GSM operators have high-speed connections when compared to US or other countries' operators.
For a service with quota of 1GB/month, you may pay between 25TL (~$15) - 50TL (~$25).
I would suggest you to see Turkcel, Vodafone and Avea shops (owned by them) and compare the prices. about 6 years ago
We flew into Istanbul airport on May 15 and all 3 companies listed had retail shops before leaving the airport. Prices do vary. Vodofone had an all in one price, 120 TL for unlimited for 30 days. TurkCell charged 25 TL for the micro sim and then data was about 20 TL for 1 GB, 39 for 4 GB, 79 for 10 GB. Avea charged 40 for sim card and then prices were similar to Turk except they had an 8 GB option for 59 I think.
Be warned, they might forget to tell you but you need to register your device in Turkey, or the government shuts if off after 10 days. They will do it for you but might charge 10 TL. They didn't warn us about the charge at first.
We choose TurkCell, service is good, but there is a lot of wifi here too. Almost every hotel and every bus we've been too has decent wifi so you don't need much data. about 6 years ago
Tried to buy 1GB iPad sim at the airport, this is the result: Vodafone would not sell anything cheaper than 110TL (4GB). Turkcell would not sell anything cheaper than 65TL (1GB). They have different prices for contract customers. Obviously as a tourist there for ten days, I would not purchase a contract. about 5 years agoAnswered by nigga via WorldNomads.com
I suggest you to purchase a SIM card from either turkcell.com.tr, or vodafone.com.tr, since they have the largest network available in Turkey, and in every city center they will work for 100%.
Also, you can consider renting a portable wifi hotspot from alldaywifi.com for periods shorter than 3-4 weeks. But for more than 4 weeks, purchasing a SIM card will be cheaper. over 3 years ago
My wife and I were in Istanbul last January. At the Istanbul Ataturk Airport there were 3 stores who sells simcard.
The prices are almost same 80 Turkish Lira for just simcard. But they are overcrowded.
We finally rent a mobile hotspot from iugo gadgets for rent at the arrival terminal.
We paid total of 40 Euros for 7 days. The mobile hotspot had unlimited data.
It was cheap comparing to other simcards..
We dropped the device back to the store before our flight about 2 years agoAnswered by Takumi via WorldNomads.com