Thanks so much for sharing this information.
I thought for the longest time that I was being paranoid when I would turn my cell phone off completely in order to perform tasks that may have been questionable in terms of legality.
Admitting this now should pose no risk, as these were more childish indiscretions rather than overt crimes. And I have since come to value my liberty far more than any thrill I may have received from such activities.
It has actually been a few years since our Law Enforcement Agencies have been able to force a person to unlock their phone with biometrics. https://www.theatlantic.com/technology/archive/2016/05/iphone-fingerprint-search-warrant/480861/
One detail of this article stood out when I was reading. If a smartphone is completely powered off, it cannot read a fingerprint to start up; it requires the PIN.
That would not have saved you the inconvenience of losing your privacy in the circumstance you described, but it can protect people who are already in this country and have privacy concerns.
Since the time when I engaged in questionable activities has long since passed, I have implicitly agreed that my privacy is not any longer a right or reasonable expectation.
I do understand that it is a Constitutional Right. I also understand that I have other rights under the Constitution of the United States as I am a Citizen of this fine Country.
But I also understand that engaging in activities such as participating in the Digital Age with things like computers, tablets, or smart phones is an implicit agreement to forgo privacy.
Of course, if you are a hacker and sufficiently knowledgeable to protect yourself with anonymous protocols and other tools to keep your activities online from being tracked; for now, you can probably expect to maintain some privacy. I guess.
I would never guarantee anyone that they can reasonably protect themselves from having their private activities become a matter of Public Record. There are entirely too many ways of spying on people these days to make that kind of guarantee.
In fact, I would view any such guarantee as suspect in this day and age. Even when it is guaranteed by the Constitution.