

https://blogs.dsu.edu/digforce/2023/08/23/bfu-and-afu-lock-states/
this blog entry gives a decent primer on the concepts of bfu (before first unlock) and afu (after first unlock), obviously from “the other side”, but still.
in short: when in doubt, always fully power down your device, since this is the only way to re-encrypt your phone, making access to contacts, messages, sensitive files, etc. much more difficult.
love how all of a sudden, everyone remembers that handhelds were a thing