This $70 device can spoof an Apple device and trick you into sharing your password | TechCrunch
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A researcher built a $70 contraption designed to send pop-up prompts to nearby iPhones, which could trick targets into giving away their password.

Was at a café today when I got the notification to connect to an Apple TV. I dismissed it twice, after a few minutes phone froze, and didn’t respond until a force restart. Switched off Bluetooth, it was still lagging so restarted again and now working fine. I noticed a lot of the other customers also were having problems, almost 5 other people all had iPhone logo on their screen and exclaiming their phone froze.

And then saw it happen to 2 friends I was with as well.

I believe it was this, or similar to Flipper Zero.