Hello, Can we consider this feature/option is robust way in case the phone seized.

    smexy interesting. I don't really follow these things. I usually learn about new features here.

    Based on what I found by searching very fast, I don't think it can be added to GrapheneOS. It looks like it's likely part of the Stock OS, and the feature would be closed-source. Though I could be completely wrong about that.

    The feature is indeed closed source and is implemented by /system_ext/app/RepairMode in the stock OS. It's a really simple app and I don't think it'd be too difficult to reimplement if someone wanted to. It creates a DSU (dynamic system update) slot with a new userdata image. This allows repair mode to use all of the stock OS partitions, except for the user data. When booting into the new DSU slot (which they named repairmode.lock), the same RepairMode app will adjust some system settings, like disabling the initial setup wizard, the factory reset option, and the OEM unlocking option. When the user exits repair mode, the DSU slot is deleted.

      3 months later

      What is the current recommendation to secure one's data while leaving one's phone at a phone store for repairs?

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        CyberOtter depends on the damage. I would recommend a factory reset, if it can't be done, force a restart and leave the phone in BFU.