Overview
- Numbers whose last digit is 0 face a registration deadline on Saturday, August 15, and carriers will have 72 hours after that date to start suspending lines that are not linked to a user’s CURP.
- Public data show tens of millions of lines remain unregistered, mostly prepaid, and the government has estimated roughly 40 million prepaid lines still need linkage.
- Regulators have officially carved out three technical exemptions for SIMs that cannot make or receive voice calls, cannot send or receive SMS, or cannot establish internet-based communications.
- Carriers must send at least two SMS reminders per week to unregistered users and increase message frequency in the seven days before each digit-based cutoff, and suspended lines keep access to emergency services and can be reactivated after registration.
- The CRT staggered the enforcement through December 31 to avoid overloading networks after regulators warned a mass suspension could destabilize service, a risk that will shape how many lines are actually cut and how operators carry out the roll‑out.