The stable version of Android 12 is now available, bringing major UI transformations and several lesser-known improvements that developers need to be aware of. To build a dedicated device fleet on Android 12, developers should target the Android 12 SDK with API level 31 and use Android Studio Arctic Fox | 2020.3.1 or higher. The new feature allows users to quickly turn off the microphone and camera, giving them more control over when apps can see or hear them. Additionally, applications can now hide overlay windows displayed by other applications, and device properties attestation has been improved to verify security keys and certificates generated on the device. Bandwidth estimation improvements have also been made, allowing for a more accurate estimate of expected throughput, while restrictive app standby buckets prioritize apps' requests for resources based on usage patterns.