DITO SIM registration is a mandatory process required by the Philippine government under the SIM Registration Act (Republic Act No. 11934), which aims to curb criminal activities like text scams, fraud, and identity theft by linking mobile numbers to their actual owners. All new and existing DITO subscribers, including prepaid and postpaid users, must register their SIM cards by providing valid government-issued identification and personal information—such as full name, date of birth, sex, and official address—through the DITO App or their official SIM registration portal to ensure continued network access and avoid deactivation.