Digital ID When Battery Is Dead

The main use case for Digital ID is so that you never have to carry around your physical wallet, because you always have your phone with you and everything you need is there. But what happens when your phone's battery is dead and you can't boot up your phone? Will there be a way to present Digital ID (or other passes) when the phone can't be booted because of a dead battery?

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For certain uses, especially Transit, a pass can be set to express mode so it doesn't need to be further authenticated when presented to an appropriate reader. This allows you to go quickly through the gate by presenting your watch or phone.

Passes set to express mode also continue to work for some time after the battery is too low for your watch or phone to otherwise operate, allowing you to still ride home.

See the heading Express Transit cards with power reserve at https://support.apple.com/en-us/HT209495

Express mode is not intended for use where authentication is always needed. In that case you will need a source of power.

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Frameworks Engineer
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