If you are a tourist, you won't have a problem. I guess you can use your phone without registering it for 120 days or so. 99% of the tourists are leaving before 120 days. This is not affecting them. 
Sana da merhaba komşu, greetings from Turkey. 😄🙋🏻

turker

security

GrapheneOS: Everything you need to know about the privacy-focused Android fork

ch0k1

Merhaba komşu, greetings from Bulgaria.

That's very vile of them 😡

I can't think of how tourists or immigrants use their phones if that's the case...