turcell seems best for reception. avea is the cheapest especially if you are a student, but doesnt work everywhere. some plans have free in - company calling (like turkcell to turkcell)

another option is telsim.

there are also monthly plans and Kontor (credit) plans (these use calling cards. Most people in turkey use the calling cards. The phones all work on GSM service with sim cards.

if you have a phone already and it works with a sim card it might work in turkey. all you have to do is make sure that its not sim- locked by the company which you got it from ( you can ask the company). you can get the sim lock removed ussually under 25 dollars.

theres also some different phone ettique in turkey ....like people will do whats called a "cagri" which i found very odd when i first got there but now used to it...

its when they dial and let the phone ring once and hang up - its meant to mean they are thinking abut you and this game can go on for hours if you reply . its done cus it costs no money !