The Comisión Reguladora de Telecomunicaciones (CRT) in Mexico established a deadline of August 31, 2026, for prepaid mobile users with phone numbers ending in 1 to register their lines. ^[1] During the same period, AT&T reported 24.06 million active mobile lines in Mexico. ^[2] Definitive suspensions for lines ending in 1 are scheduled to begin at 12:00 am on September 1, 2026, following a 72-hour grace period. ^[3] The CRT mandates that mobile lines be linked to the user's identity via the CURP (Clave Única de Registro de Población) to combat fraud and extortion. ^[4] Users who fail to register their lines by August 31, 2026, may experience temporary service suspension. ^[5] Service restoration may take up to 72 hours depending on system load and data validation. ^[6] Telecom users in Mexico have reported losing mobile signal immediately after completing the mandatory phone line registration process. ^[7] The temporary loss of service is caused by the time required for administrative data review and synchronization with carrier platforms. ^[8] AT&T reported total revenues of 22,957.65 million pesos for the fourth quarter of 2025. ^[9] Users are advised to wait 24 hours before contacting their carrier if the signal has not returned. ^[10]