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It's very easy to install the app and submit an attestation sample to help with expanding device support: twitter.com/DanielMicay/st Every device launched with Android 8+ has the baseline support in the hardware-backed keystore and can be supported once a sample is submitted.
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To submit a sample, install the app from the Play Store (play.google.com/store/apps/det) or GitHub (github.com/AndroidHardeni), open it, open the menu from the action bar and press 'Submit sample data'. Submissions from the stock OS with bootloader locked will enable expanding support.
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It would be particularly helpful to get a Pixel 3 XL sample. There's initial support for the Pixel 3 already but it hasn't been expanded to support all new functionality. The new Pixels have key attestation v3 along with a StrongBox Keymaster implementation on the Titan M chip.
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