The Turkish government wants to impose a purchase tax on those who buy mobile phones outside Turkey,
Your phone will be blocked within 120 days after you start using the Turkish SIM card in Turkey.
To activate it you need to deposit 130 liras to the tax office and then take this receipt to the Turkish GSM operator
You buy your SIM card, or you can go to any shop specializing in the subject of urinals, and it does the necessary solution.