SASSA SRD Phone Number Change 2025: South African social security agency send all the official messages and notifications to the beneficiaries on their registered mobile number and email ID. SASSA Update 2025Mobile number is very important to get the latest information from the SASSA Update 2025. There are many fraud agencies which are circulating your mobile number and frequently requesting OTP on your mobile number. Enter your date of birth and password to login on the dashboard and click on the change mobile number details. your date of birth and password to login on the dashboard and click on the change mobile number details.