Google phone verification and RCS privacy risks
📱 Google’s phone number verification notifies users when their SIM is confirmed and links that number to all Google accounts on the device. The feature supports RCS messaging and fraud protection but can surface hidden verification SMS or metadata collection. Verification runs by default, may use carrier APIs or hidden SMS, and can attach identifiers like ICCID/IMSI. Users can opt out per account but may lose RCS and risk re-enablement.
