[deleted] With GrapheneOS, if you power off your pixel phone completely (i.e: Pixel 6), does that make it untrackable until you turn it back on again?
Yes, it does. If you power it off, it actually powers off all hardware completely. The same cannot be said about all other phone brands, but Pixels running GrapheneOS does power off completely. You do not need to remove the battery, doing so won't gain you anything.
But, if you put the phone in airplane mode, and disable Wifi and Bluetooth, you can't be tracked even if you leave the phone powered on. Those switches actually power off the corresponding hardware components. At least GrapheneOS developers claim that, and I assume they know what they are talking about here. But if you don't need your phone, powering it off completely is of course the safest option.