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I'm guessing it's because iPhones are easier to characterize over dozens of different android MAC address prefixes.

But with MAC address randomization, I don't recall Apple doing anything different than other vendors so not sure what they are detecting that an Android wouldn't reveal as well.

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Isn't it rather detecting UWB or pings from NFB reader? But at least the latter should work also do detect Android phones (see also https://www.reddit.com/r/RTLSDR/comments/1jsr9jv/eavesdroppi...).

Yeah that makes more sense than wifi or Bluetooth. It's probably more of a guarantee than a hard limit on only detecting iPhones. The list of devices with UWB support show all iPhone models since the 11 (except e models) but for Android, it's mostly just the pro/plus/ultra versions of the flagships.

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