I emailed
Turkcell and got this prompt reply:
When you come to Turkey, with your passport you can buy prepaid turkcell line from Turkcell extra shops.
You can also connect to the internet with this simcard by gprs.
If you connect to the internet , it costs 2 credit for every 35 kb
And also we have internet packages, they are cheaper;
Weekly internet package - 50 mb - 20 credit
Montly internet package - 100 mb - 65 credit
Montly internet package - 1 gb - 210 credit
Montly internet package - 4 gb - 290 credit
Montly internet package - 6 gb - 440 credit
Montly internet package - 8 gb - 510 credit
After you buy prepaid line you should choose one of them. You can take help about activation from Turkcell extra shop or Turkcell customer care. Our telephone number is; 4440535
About your mobile phone's imei registration; when you buy prepaid line in Turkcell extra shop , they can help you about registration. They need your passport and your Turkcell line's agreement.
I also found this webpage about
Vodafone:
Vodafone Mü?teri Hizmetleri - Mobil ?nternet Kendini A?an Tarife
Click on
Kendini Aşan Tarife opsiyonunu almam durumunda nasıl ücretlendirilirim? for the mobile internet tariff.
It seems to be a progressive charge: for prepaid:
- 5TL for the first 5MB
- 5TL for the next 15MB
- 5TL for the next 30MB ... etc
(At least, that's how I interpret it, but I may have missed something.)