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If your phone doesn't have a removable battery, how do you know if it's really off?
by mattkevan 11y ago
If your phone doesn't have a removable battery, how do you know if it's really off?
- kencausey 11y agoNot entirely relevant but note that if a power switch does not have a mechanical difference between the off and on state then there must be an active component that at the very least must monitor the power button to detect presses. I don't really know, but it seems likely that in a smart phone the SOC is used to monitor the power button and it is therefore only ever in a very low power state (sans battery removal). That doesn't of course mean that any radio components are receiving power.
- tonyedgecombe 11y agoI think you could do that in a passive way as well, where the act of pressing the button powers up a circuit that holds the power on.
- Chris2048 11y agolow power devices now exist that can live of small traces of power. Even with the battery removed, how can you be sure it's still not listening?...
- sleepybrett 11y agoThis is why you should never take phones into any kind of sensitive meeting or at least put it into a faraday bag.