Android’s Failed Authentication Lock — first introduced in Android 15 — now comes with a dedicated on/off switch in Settings. This gives users clearer control over automatic locking when there are too many failed unlock attempts.

Longer lockout periods
Android has also increased lockout times after repeated incorrect PIN, pattern, or password attempts, making brute-force guessing significantly more difficult.

Broader Biometric Safeguards

Expanded Identity Check protection
Google has extended Identity Check so that all apps and actions using the Android Biometric Prompt — including third-party banking apps and Google Password Manager — now require biometric authentication when the device is outside trusted locations.

Smarter Theft Detection & Recovery

AI-Assisted Theft Detection

Theft Detection Lock enabled by default in select regions
In certain markets, such as Brazil, Theft Detection Lock is now enabled by default on newly activated devices. This AI-powered feature can recognize “snatch-and-run” motion patterns and automatically lock the screen when theft-like behavior is detected.

Enhanced Remote Locking

More secure remote device locking
Remote Lock — which allows users to lock their Android phone from a web browser if it’s lost or stolen — has been upgraded with optional security challenges. These added checks help prevent misuse and ensure only the rightful owner can trigger a remote lock.

Availability

• Authentication, biometric, and control-related updates are rolling out to devices running Android 16 or later.
• Recovery and remote lock features, including those with optional added security, are available on devices running Android 10 and newer.

Why This Matters

According to Google’s security team, phone theft goes far beyond losing a device. It often opens the door to financial fraud, identity theft, and unauthorized access to personal data. These updates are designed to protect users at every stage — before, during, and after a theft — by combining stronger lock mechanisms, enhanced biometric checks, intelligent theft detection, and improved recovery tools.