this post was submitted on 21 Apr 2026
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Privacy
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I don't know about Samsung and Apple, but Google Pay works offline.
Most can, but they still rely on your phone getting an internet connection later, on your phone being trusted to send data over itself, and of course still require your phone to actually be charged. (Can change if it's a regular card depending on the issuer though)
Also, if you're just generally curious about stuff related to offline payments, there's actually a major security hole that Visa refuses to fix, which allows a device to pretend to be an offline-only card reader, then charge any value to someone's card, and get away with it, even if their device is locked.
Not really a point in favor of my original argument though, since CBDC infrastructure would require replacing or updating all the readers anyways, and implementing the standards to prevent such an attack, like MasterCard has used for a while now.
Only if the store you're paying at has Internet.