Mh, from GSM official docs SIM cards are small OSes with yes a limited power, but not that limited, they can officially set various kind of phone options, use s

Mh, from GSM official docs SIM cards are small OSes with yes a limited power, but not that limited, they can officially set various kind of phone options, use speakerphone etc. Of course that does not automatically means that those systems do exists like fictional echelon project but potentially power is there and know tech also...