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this post was submitted on 04 Mar 2026
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Memes
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Even without a SIM card you're not much less trackable. The phone still maintains a connection with the cellular towers for emergency services, sometimes even when it's fully powered off. The best way to prevent this is to remove the battery.
How when there is no power going to the mobile transceiver?
Because "off" is not really off in most mobile devices, more like a deep hibernate. Conveniently you can also no longer remove the batteries from any modern phone.
What is your source on that because when I was working for a wireless telco we did a spectrum analysis of mobiles off and on and the phone signal drops below the noise floor when off with or without the battery connected.
iPhones have a feature where they still intermittently broadcast a Bluetooth signal after being turned off or even if they shut off because of low battery: https://discussions.apple.com/thread/255809396?sortBy=rank.
Google does the same thing with the Pixel: https://support.google.com/pixelphone/answer/9338817?hl=en-AU#zippy=%2Cstep-find-offline-devices-and-devices-without-power.
We are talking about mobile signal not Bluetooth, check the root comment.
I'm just addressing what you quoted. They said phones don't actually turn off anymore, you asked for a source on that.
My understanding is that it's not the phone signal, but bluetooth low power mode, which is how many countries did covid exposure tracking.
So not full location triangulation, but more a hypothetical that a business or government could very easily set up bt low power beacons and identify devices that got in range like they did for covid tracking.
We are talking about mobile signal not Bluetooth, check the root comment.
It's not cellular bands, I believe it's Bluetooth beacons and possibly UWB. But the fact that "Find My" works even when the phone is "off" is a pretty well documented fact. Of course if you could actually unplug the battery those would die too.
We are talking about mobile signal not Bluetooth, check the root comment.