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Brick phones will ring in an unlikely revival
(www.reuters.com)
This is a most excellent place for technology news and articles.
That looks like a 3d printed shell over some sort of scannable chip that pairs with an app on a smart phone to require a physical action to unlock the full phone experience.
A printed QR code paired with an similar app would serve the same function.
Good point. Reminded me of this alarm app, where you scan a QR code to disable the alarm:
https://f-droid.org/packages/com.sweak.qralarm/