Yet more difficulties for vulnerable groups. Given how much cartels rule mexico, if this data gets in their hands the consequences are unimaginably bad.

Interesting, Mexico has in the past been a big source of SIM cards for questionable activity in the US. Now the flow may be reversed but of course the cost is ~15x in the US. Or will there be a big influx of Honduran or some other CA county SIMS?

what a bad idea...

this would be laughably easy to circumvent and terribly easy to abuse

This will make phone number a proxy for Government ID, which is a step back for privacy. As applications start to hard code this assumption, the kinds of problems that make you want to change your phone number become exceedingly more difficult.

Will prepaid SIMs from outside Mexico no longer be able to roam onto Mexican mobile phone networks? Another problem. Given the notorious corruption my guess is it will just cost $xx to get a fake CURP. I'm sure there are other ways to circumvent. This leaves criminals with ample opportunities to avoid effective tracking but leaves out the legitimately at-risk populations mentioned in the article.