Google is gearing up to enhance smartphone security with Android 16, and one of the most intriguing additions might fly under the radar: an automatic reboot after 72 hours of inactivity.

This feature, recently uncovered by Android Authority through an analysis of Google Play Services code, is part of what's being called Advanced Protection Mode. Aimed at making stolen or unattended devices far less exploitable, the option adds another layer of defense by ensuring a phone resets to its most secure state if it's left untouched for three days.

The mechanism is simple: if a user doesn't unlock their device within 72 hours, it will automatically restart. This reboot reactivates Android's highest-level security barriers, like requiring the user to manually enter a PIN, password, or biometric data before gaining access again. It's a strategic way to render stolen phones less usable and protect sensitive data without requiring constant input from users.

While this feature is reportedly optional, it's a quiet but assertive step towards more robust built-in security. It's especially beneficial for those who might rely on weaker protections, like swipe patterns or no lock screen at all.

Interestingly, this move mirrors Apple's recent update in iOS 18.1, which introduced a similar safeguard. It appears Google is keeping pace in the mobile OS security race, and with Google I/O set for late May, this could be one of Android 16's key announcements as part of its summer rollout.

What remains uncertain is whether the reboot function will be turned on by default or if users will need to activate it themselves. Still, its mere presence signals a shift in how seriously Google is treating device theft and personal data protection.

Whether you opt in or not, the message is clear: default security on Android is getting smarter and stronger.