Lots of countries do: https://blog.telegeography.com/liberty-vs-security-the-battle-over-sim-registration https://blog.telegeography.com/liberty-vs-security-the

Lots of countries do: https://blog.telegeography.com/liberty-vs-security-the-battle-over-sim-registration https://blog.telegeography.com/liberty-vs-security-the-battl... You also have to remember carriers will track the approximate position of a phone with an anonymously-purchased SIM-card, so better not take it home.