Comment by madethemcry

3 days ago

Can you please give any sources? While it sounds plausible and interesting it's nothing more than a wild conspiracy theory without some background information.

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madethemcry

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h4ck_th3_pl4n3t  3 days ago

Buy a broadcom smartphone. Turn bluetooth off, and set it to airplane mode. Then Bluepwn your device, with bluetooth turned off.

Funny how airplane mode didn't work.

That's just one of the quirks. Baseband and what qualcomm is tracking is way worse.

I recommend buying an old Motorola Calypso device and fiddling with osmocomBB, you can DIY an IMSI catcher pretty easily. And you'll be mind blown how many class0 SMS you'll receive per day, just for tracking you. Back in the days you could track people's phones remotely but the popularity of HushSMS and other tools made cell providers block class0 SMS not sent by themselves.

This wiki article is a nice overview: https://github.com/CellularPrivacy/Android-IMSI-Catcher-Dete...

aja12  3 days ago

Baseband SoC running their own OS independent from Android/iOS and staying asleep (while still listening for incoming signals) is very much no longer in conspiracy theory territory and more an established fact now. I don't have the source at hand but it's in one of the standards. And the purpose is very clear: LEA like Interpol must be able to locate any IMEI at any point if in tower range, regardless of the power state of the "main" OS

  • pdesi  3 days ago

    Even in airplane mode?

    • h4ck_th3_pl4n3t  3 days ago

      I dare you to do the following:

      Charge phone to full 100%. Turn it off.

      Put it into a faraday cage, e.g. a steel box, for 7 days.

      Take it out again and wonder why the battery is empty.

      (The faraday cage has the effect of making the modem have to switch bands constantly, which costs more electricity than sleep mode in LTE)