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Editorial Team
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Asked: 2026-05-20T11:00:43+00:00

I’m not sure, if it’s the right place here to ask this question. But

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I’m not sure, if it’s the right place here to ask this question.

But can anybody explain more detaild, how sim-based mobile phone tracking’s working, und if it costs anything (the second part is very important)?

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  1. Editorial Team

    The Wikipedia article explains it pretty well:

    Mobile phone tracking tracks the current position of a mobile phone even on the move. To locate the phone, it must emit at least the roaming signal to contact the next nearby antenna tower, but the process does not require an active call. GSM localisation is then done by multilateration based on the signal strength to nearby antenna masts.

    So as soon as your phone is turned on, it starts to emit signals that the antennas catch. If several of them receive the signal, that (and the signal strength) gives a pretty good indication of your location.

    It needs a bit of software (which the law requires today), so it doesn’t cost anything “extra” for the people that provide the hardware. It’s not free for normal people to use, though.

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