Even State Department-funded Human Rights Watch admits that authorities combine legal and illegal methods to obtain convictions: https://text.hrw.org/report/2018/01/09/dark-side/secret-origins-evidence-us-criminal-cases
Combining dragnet surveillance with device hacking is intended in the design of both tools. Hence, State Department-funded Signal dupes you into handing over your identity as part of the population-centric mapping. In custody, your phone will be hacked when it is taken away if it’s important.
https://xcancel.com/hannahcrileyy/status/2034273723667161480#m
Yeah tails does have graphene beat, but a lot of folks see a phone as a necessity. Graphene is best if you’re gonna have a phone. It can turn off the USB port where it can’t even be charged without being off. It can reboot itself if not unlocked frequently enough, putting the phone back into a BFU state.
Now it’s possible that there’s some exploit a state knows that is not public, but the software they generally use does not work on graphene as long as you are not running a pre-2022 version of graphene. Someone else mentioned rubber-hose cryptanalysis, but like if I’m getting beat for my unlock, then what do I care about getting charged with destruction of evidence?