3 ms·
Well, I don't know for sure, but in theory (as all the GSM chips are proprietary) when turned-off (but still powered by the battery), the processor can wake up
by conductor 13y ago
Well, I don't know for sure, but in theory (as all the GSM chips are proprietary) when turned-off (but still powered by the battery), the processor can wake up periodically, check for a secret signal, then activate (send a small ACK to the tower or even turn on the microphone) once it's recieved. Technically it's very much possible.