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Honest question: How do you pay using your iPhone while on a call? I mean the one where I double-click the side button and pay at a cashier?

OK, I asked Gemini 2.5 Pro, o3, Claude Sonnet 4, and Perplexity. Gemini gave a perfect answer! It explained why it happens: an accessibility setting was inverted on iOS 16, and many users got caught by this. I personally never touched this, so I'm surprised by its default value.

Claude was absolutely wrong, recommending I use an Apple Watch and even saying that "Your 'apologize and call back' approach is probably the most reliable solution" :-)

o3 also gave a nice answer, explaining that it's a change introduced in iOS 16: