Mexico - In passing this law, Mexico joins the proud ranks of China, Saudi Arabia, Afghanistan, Venezuela, and 18 other countries that require biometric data in order to obtain a SIM card

Creating a nationwide biometric database will be like handing Mexico's worst criminals a menu that gives them access to any citizen or public official they might be interested in.

Collecting biometric data is much easier than keeping it safe. If neither the NSA was able to keep its data safe nor the U.S government was capable of keeping safe its most sensitive employee background checks, what chance do Mexican telecoms or the country's government have? None. Mexican citizens have reason to be worry.

https://restofworld.org/2021/mexico-cellphone-data-law-crime/