[JumpCrisscross]

> if your phone gets lost or stolen in the middle of your international journey

Presumably your face still works. And if both fail, you do what one does when you lose your boarding pass: talk to the gate agent.

[RandomBacon]

Hopefully you don't have any allergic reations, wear bandages, grow beards, experience weight changes, etc.

[JumpCrisscross]

> Hopefully you don't have any allergic reations, wear bandages, grow beards, experience weight changes, etc.

Digital ID has no issues with me having or not having on glasses, growing and losing a beard or having had one eye patched. When it has, a person can make a subjective call. Like, people lose boarding passes all the time. The status quo is faulty and expensive.