Google has officially released Android 17 QPR2 Beta 4 (Build CP41.260814.003) for eligible Pixel devices. While Quarterly Platform Releases (QPRs) generally focus on stability and system refinement rather than massive API overhauls, Beta 4 brings crucial security safeguards, critical bug fixes, and long-term platform improvements.
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1. Major Focus: Scam Protection & Call Forwarding Limits
The headline change in Android 17 QPR2 targets social engineering scams and unauthorized call forwarding:
Restricted Programmatic USSD Requests: The OS now restricts apps from silently running call-forwarding codes (such as
*21#) in the background. Standard apps attempting to execute these USSD codes using only basic phone permissions will be blocked.Mandatory System Confirmation: If a user manually dials a call-forwarding code in the dialer, Android 17 QPR2 now displays a mandatory system-level confirmation dialog before executing the command.
Developer Guidance: App developers who manage call setup flows must now use the standard dialer intent (
ACTION_DIAL) so users can explicitly confirm the action.
2. Top Pixel Bug Fixes in Beta 4
Beta 4 squashes several widespread bugs affecting daily usability across Pixel phones and connected accessories:
Microphone & Audio Lockup: Fixed a critical bug where screen recording locked up system audio, completely disabling the microphone for apps like Gboard and Gemini until a device reboot.
Overheating & Random Reboots: Solved thermal management issues that caused sudden reboots during normal usage.
Bluetooth Audio Routing: Resolved an issue where call audio defaulted to internal phone speakers instead of connected Bluetooth headsets.
Smart Glasses & XR Support: Fixed screen rendering failures and crashes when connecting USB-C XR glasses or using 3D visual modes.
UI & Navigation Fixes: Resolved unresponsive notification shade pull-downs, Recents app switcher visual glitches, and gesture navigation freezes.
80% Battery Limit: Fixed a bug where the 80% battery protection feature caused extreme charging slowdowns near the top threshold.
3. Core Android 17 Security & Platform Highlights
Beyond Beta 4-specific fixes, Android 17 continues to lay the groundwork for stricter system performance and security:
Post-Quantum Cryptography (PQC): Integrated quantum-resistant algorithms (like ML-DSA) inside the Android Keystore.
Default Certificate Transparency: Enforces strict logging for network connections to prevent security breaches from compromised Certificate Authorities.
Hardened Background Audio & Memory Limits: Enforces stricter boundary controls on background memory usage and prevents apps from recording background audio without clear user indicators.
Mandatory Large-Screen Support: Ignores app attempts to restrict orientation or disable resizability on foldables, tablets, and large displays.
Release Overview
| Key Details | Specification |
| Build Number | CP41.260814.003.A2 / CP41.260814.003.B1 |
| Security Patch | August 5, 2026 |
| Google Play Services | 26.28.33 |
| Supported Devices | Pixel 6a through Pixel 9 series, Pixel Fold, Pixel Tablet |
How to Get the Update
Pixel users already enrolled in the Android Beta Program can update directly via Settings > System > System update. Developers and advanced users can also flash the official factory images or GSIs via the Android Developers portal.
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