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  • Isn't it the cell triangulation that does this rather than GPS

    In movies you are meant to snap your phone in half and throw it in a river, but I think the key element is really the sim card

  • No. GPS uses a fix on three geo-stationary satellites to calculate your position. Most phones support Assisted GPS which gives a quick fix based on cell tower triangulation, but that’s done simply to speed up the users ability to use their location.

  • Isn't it the cell triangulation that does this rather than GPS

    That's what I thought. Isn't GPS too slow and power hungry for this sort of thing?

  • In movies you are meant to snap your phone in half and throw it in a river, but I think the key element is really the sim card

    GSM IMSI (SIM) and IMEI (phone) IDs are both available to the network and so also law enforcement. IMEIs with lots of associated IMSIs probably get flagged as interesting.

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