>notice that battery life has suddenly decreased considerably
This here is the key thing. I know that when the phone sitting in front of me is off, it is off because when I turn it back on it has no idea what time it is and I don't have cell reception here. If it's not even running a clock, it (trivially) can't be running GPS, and other stuff is fairly unlikely.
This here is the key thing. I know that when the phone sitting in front of me is off, it is off because when I turn it back on it has no idea what time it is and I don't have cell reception here. If it's not even running a clock, it (trivially) can't be running GPS, and other stuff is fairly unlikely.