All smartphones, Apple and Android, use dedicated audio processors which are always listening for the command word by saving recent audio to a buffer and analyz

All smartphones, Apple and Android, use dedicated audio processors which are always listening for the command word by saving recent audio to a buffer and analyzing it before discarding it. There has never been any evidence that I've ever seen that these audio processors save and transmit their work pre-activation, only post-activation of the service. Although I do remember in the 2014-2016 time frame when the CIA hack tools got released I believe there was a tool which could basically hot-mic certain iPhones through a zero day and use it to live transmit to a state actor without warning the user (minus the device getting hot from recording and network access). I'm sure Android has similar zero days just as all software does.