has someone measured that airplane mode does this, ie verified? can you really depend on this in a mission critical scenario is what im asking with many phones having non removable batteries these days, this is mostly all we have left
Yes, they're off. It's even pretty easy since you can just measure the waves.
What has that to do with batteries? And what do you mean "we have left"? Sounds like a paranoid mindset to be in.
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You can test it pretty easily. It isn't fool proof but you could attempt a 911 call or call the phone you are testing. The other sure way to block the phone's connections is to place it in a faraday enclosure. If your threat model is life or death there is no way I'd depend on a software airplane mode. I'd use a faraday bag.
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how do you call a phone that has no sim card but is in airplane mode? ok put it in a faraday bag but im asking if anyone has tested whether just plain airplane mode is leaking any signal to the outside world we know faraday bags do work but how well do airplanes mode work on their own, is the question, and maybe this will also vary depending on the software (stock, android, ios, whatever)
yes, you can have airplane mode on and you can switch on wifi and wifi works, but is your device leaking data to towers when in airplane mode with no sim card, is the question
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Faraday disagrees.
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