# Google Ships Fake Call Detection in Phone by Google — RCS-Powered Silent Handshake Flags AI Deepfake Impersonation Scams on Android 12+ Devices, Rolling Out Globally This Month Starting With Pixel

> An invisible RCS handshake between contacts that calls out AI voice-clone scams in real time on Android.

- Org: Google
- Date: 2026-06-02
- Category: security, tool
- Source: https://blog.google/security/android-fake-call-detection/
- Canonical page: https://ai-tldr.dev/releases/google-android-fake-call-detection/

## In short

Phone by Google now silently verifies calls between contacts over end-to-end-encrypted RCS. If the caller ID matches a contact but their real phone isn't dialing, Android warns you. Pixel first, then global rollout this month.

## What it is

Fake call detection is a new on-by-default feature in Phone by Google that flags incoming calls where the displayed contact ID does not match the contact's actual device. It targets voice-deepfake impersonation scams — the kind that mimic a parent's or a manager's voice to ask for emergency wires. INTERPOL's March 2026 fraud assessment pinned impersonation as a top driver of $400B in global losses.

## How it works

When a saved contact dials you and both ends are running Phone by Google, the caller's device pushes a silent confirmation signal over end-to-end-encrypted Rich Communication Services (RCS) the moment the call rings. The receiving phone checks that signal against the incoming call's metadata. If the contact's real device reports no outgoing call, Android shows an on-screen warning to hang up. If the contact does not have RCS, the system falls back to a secondary check before warning.

## Why it matters

Generative voice cloning has made caller ID essentially useless against a determined scammer. A cross-device cryptographic handshake — riding on the open RCS standard — restores a hardware-level signal of authenticity without forcing users to learn safe-word rituals. Because the protocol is RCS, other Android dialers and OEMs can adopt the same check.

## Who it's for

Android users, enterprise IT teams setting deepfake-resistant defaults, and anti-fraud researchers

## Try it

Update Phone by Google on an Android 12+ device

## Links

- [Google Security Blog](https://blog.google/security/android-fake-call-detection/)
- [TechCrunch](https://techcrunch.com/2026/06/02/google-rolls-out-fake-call-detection-to-protect-against-ai-deepfake-impersonation-scams/)
- [9to5Google Deep Dive](https://9to5google.com/2026/06/02/google-phone-fake-call-detection/)
- [BleepingComputer](https://www.bleepingcomputer.com/news/security/google-adds-android-protection-against-ai-deepfake-scam-calls/)