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I just got a Samsung Galaxy S9 with Android 10. In my current configuration, I have observed this rough state machine as it starts up.

Approximate state machine on startup.

The Settings > Lock screen > Contact information is a great feature. However, I see no way to ever see that message in any of the grey states without the password. Is it possible to configure Android so that the contact information is accessible from any state, or at least from powered-off or out-of-battery, without disabling all security features?

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    Looks like your device uses full disk encryption (FDE). For that encryption Google decided to use a seperate miniOS for entering the boot password. Therefore this miniOS is independent of the main OS and can't be configured at all (except for the required password). Therefore your lock screen info is not available in this mode. Modern devices use a different encryption mode (FBE) where the device directly boots Android up to the lock screen. Changing the encryption mode is only possible with root and a custom ROM. – Robert Aug 20 at 20:16
  • @Robert Android 10 forces FBE – alecxs Aug 20 at 20:36
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    @alecxs That is only relevant for the initial Android version a device is launched with. Galaxy S9 was launched with Android 8 and upgraded to 10. See Samsung statement on FBD/FDE – Robert Aug 21 at 7:01
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    @Neil pressing "emergency call" button will show the dialer where the user can input any emergency number (not only 911, but also 110 or other valid emergency numbers on the user's country), or additionally accessing emergency info. – Andrew T. Aug 23 at 7:56
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The July 1, 2020 security update also adds the contact info in the state "Your phone is encryted . . . " Simply downloading and installing this 1GB update makes all of the state machine blue.

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