Google has announced a broad expansion of Android security features, headlined by a new opt-in Scam Detection setting in its Messages app. The feature uses Gemini AI models to evaluate sender intent and warn users about potentially fraudulent messages, with analysis performed in Private AI Compute so that even Google cannot access the content. The company says this will help users spot social-engineering attempts before they engage with scammers.

Beyond the Messages update, Google is widening the reach of its existing scam warnings. After introducing Scam Detection in chat notifications on Pixel devices, the company is partnering with manufacturers including Honor, Motorola, OPPO, OnePlus, realme, vivo, and Xiaomi to enable the feature later this year. This suggests Google is treating AI-driven scam protection as a core selling point for Android across price tiers and brands.

The announcement also includes several device-level safeguards. All Android 15 and newer devices will receive automatic screen-sharing privacy this month, hiding passwords and financial details when users share their screens. In early December, call-forwarding protection will arrive on Pixel and select devices, blocking apps from secretly enabling forwarding and warning users about MMI codes. Separately, Google is working with banks in Brazil to verify incoming calls and automatically hang up on impersonators, claiming to have blocked over three million fake calls since June.

These moves reflect a broader business strategy: using on-device AI and partnerships to differentiate Android on security and privacy. The Brazil bank-call feature is not yet confirmed for the US, and Google says it will continue adding partner banks, but the direction is clear. For businesses and consumers, the practical takeaway is that Android's built-in protections are becoming more proactive, with AI doing more of the screening work before users have to make a judgment call.