A new security feature aims to enhance data protection on mobile devices by keeping user data fully encrypted until the device is manually unlocked after a reboot. This highly secure state is known as “Before First Unlock” (BFU). In this mode, access to sensitive information is blocked unless the correct password is entered — even biometric methods like fingerprint or facial recognition are disabled.
BFU mode significantly limits potential security breaches, making unauthorized access far more difficult. However, once the device is unlocked, some data may become accessible and could be vulnerable to techniques like password guessing or exploitation of security flaws.
Apple has taken a similar step with iOS 18, where iPhones automatically reboot after three days of inactivity. Upon restart, users must enter their passcode — Face ID or Touch ID is not accepted — further reinforcing device security.
