In some countries, the registration of mobile phones is very expensive because the country's communication system stops receiving the phone signal that it has not registered with, and of course registration requires paying a relatively large amount that may exceed the price of the phone!
You might come to Turkey, for example, with your mobile phone, and then the telecommunications company gives you about 4 months to register the phone, and after these four months have passed without registration, the network will not work on the phone.
In fact, the amount of the restriction has become large, and that is why many people resort to changing the "IMEI" number of the phone, which distinguishes it from other phones in illegal ways and for a small amount.
The problem here is the process of tampering with the phone, installing unknown software, and of course losing information that was not backed up.
The company "Samsung" kindly increases the level of security for these devices, so that the new versions are more difficult to change the "IMEI" number, which makes you obliged to buy a new phone from the new country for many times the price of the phone you brought with you!
This is how companies try, in cooperation with telecommunications institutions in the world, to obtain the maximum possible profits at the expense of users.
This is evident in the removal of support for old phones, so that these phones no longer receive updates that enable them to run programs as before.