Guys let me clearfy about the issue that "why people from Turkey want to change imei"
First things first, Turkey has a government loots tax from every possible way

Because of tax, smart phone prices get very very high and than people try to take a phone with them when they come back to turkey from out of country and yes its legal but you should register the phone that you bring with you. But its also has a cost, a little more than a hundred dolars! (for year 2019 the registration it costs 618 Turkish Liras its equals 115 USD right now on 03-28-2019) and you also have a passport that you must be used to treavel at least 120 days!
If you do not register that phone, its gonna be gsm disabled in 120 days. But if you try to register you should spend a lot of money to use your phone.
its ok for high end devices like iphone xs or s10 or something like that. But its a big deal for -300$ phones.
That why we are try to change imei, we are not gonna stole something, we just try to protect our money its gonna be stolen by government
In my case; i have poco unregistered with government, and i have 2 imei from my old lenovo p70a, it was broken 3 years ego but i keep the imei stickers for reuse

So I want to replace my poco's imeis with p70a imei numbers for free registration.