If you were hoping that iOS 8's ability to hide your device ID from nearby WiFi networks would render you invisible to nosy hotspot operators, you'll want to dial back your expectations a bit. AirTight Networks' Bhupinder Misra has found that Apple's hardware address randomization only kicks in under a very narrow set of circumstances. You not only have to put your device to sleep and turn off location services, you have to turn off cellular data as well -- in short, your iPhone has to become a paperweight. Even then, the masking only appears to work with iOS devices using at least an A7 processor, like the iPhone 5s.

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