Google is enhancing Android security by introducing an automatic restart mechanism for phones and tablets that have remained locked for an extended period. The feature, arriving via Google Play services update version 25.14 which reportedly began its rollout around April 8th, 2025, will force a device reboot after it has been locked continuously for three days. This action necessitates the entry of the user’s primary PIN or passcode upon the next use, adding a layer of protection for unattended devices.
Forcing a PIN After Inactivity
The core security advantage stems from forcing the device into the “Before First Unlock” (BFU) state after the reboot. BFU is a secure mode where the operating system has loaded, but user data remains encrypted using the lock screen credential, and crucially, biometric authentication methods like fingerprint or facial recognition are temporarily disabled. Access is only granted after the correct PIN, pattern, or password is provided.
This counteracts potential attack vectors that might try to bypass the lock screen or exploit vulnerabilities accessible only after an initial biometric unlock has occurred. The official changelog entry for Google Play services v25.14 confirms the function under the “Security & Privacy” section, stating: [Phone] New security feature that will automatically restart your phone if it has been locked for 3 consecutive days. This mandatory reboot differs from optional auto-restart settings found on some Android devices aimed at periodic performance tuning rather than specifically hardening security after prolonged inactivity.
This security measure is distributed via Google Play services, a core component updated separately from the main OS. This allows Google to push security enhancements and other system improvements more frequently across the diverse Android ecosystem, as detailed on Google’s general information page about system updates. These updates often include critical security patches and feature refinements delivered independently of larger OS upgrades.
Scope, Rollout, and Parallels
The auto-reboot function specifically targets Android phones and tablets. Google’s documentation and the update notes suggest other platforms like Android Auto, Google/Android TV, and Wear OS are not included in this rollout. While the v25.14 update initiated its gradual deployment starting April 8th, 2025, it can typically take a week or two for such updates to propagate to all users globally. Details remain pending from Google regarding exactly which Android versions or specific device models will gain this capability.
Furthermore, it’s not yet clear how or if the device will notify the user about the reason for the automatic restart, though Android devices already display a standard message requiring the PIN/passcode after any reboot before full access is granted. This security approach is comparable to Apple’s, which earlier introduced an iPhone “Inactivity Reboot” feature in iOS 18.1, albeit with a slightly longer four-day trigger period.
