I am going to Turkey for a 10 day trip. Is it possible to buy a 3G chip to have internet access in all Turkey for this period? What are my options and average price?
It's a pain in the butt to get mobile access in Turkey, but you it can be done. Your chances depend on how nice the person you find to sell you the prepaid SIM is, since they'll have to register the IMEI on your mobile phone with them.
Easiest option in Turkey is to buy one of their portable 3G hotspots - they run about US$80 and include the hotspot hardware with 4GB of data. Failing that you buy a prepaid SIM for around US$50 with 4GB of data. Hopefully you're going through a big tourist hub like Istanbul and you'll get a sales associate that's used to opening foreign accounts!
There are now lots of companies that sell Prepaid SIM for wherever you are going, they arrive by post before you leave home and you just put then in the normal unlocked GSM phone.
As we are going to turkey in a month’s time, I can’t tell you how well any given company works yet.
In the end we just went into a mobile shop in turkey, we had to try 3 so as to find one that spoke good English and understood the setup. We brought a prepaid SIM, and added one off data and call plan to it, they needed to copy our passports as part of the process, and the paper work took the shop about half an hour. (Our iPhone is not locked to a network, as we brought it from Apple directly.)
The main problem is that if your mobile phone is seen on a network in Turkey for much more than 2 weeks, the network locks you out, this is to stop Turkish people importing phones without paying the import tax.