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The best use of QR codes
(slrpnk.net)
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Not all Phones habe qr code detection in the camera mode
Most do. It's the only reason they finally somewhat caught on after a rough start when users had to download an app in order to read the code.
Every smartphone I’ve had does but every one of them has also asked if I want to follow the link rather than just doing it.
Name one released in the last five years that doesn’t
Idk I use a Pixel with GrapheneOS Camera App
That's custom software on custom firmware, which is very extraneous to the average consumer...
It's also not a "released" phone in the sense that Google isn't selling it in that state.
And those that do don't download and run code willy-nilly.