[wat10000]

It's extremely unlikely they'd jail me for obstruction. They wouldn't have a legal leg to stand on and they know it.

From CBP themselves:

"If a traveler being admitted as a U.S. citizen does not present their device in a condition that allows for examination, the U.S. citizen traveler will not be denied entry into the United States based on CBP’s inability to complete an inspection of their device. However, as noted above, their device may be subject to exclusion, detention, or other appropriate action or disposition."

Worst case would be losing the phone, which is a tradeoff I'm willing to make.

[mothballed]

They have verbatim told me they would deny me entry into the country merely for not answering things like random questions about what work I do in the country or whether I own guns (I am a US citizen). They involved HSI and tried to get my passport revoked, they tossed me in a jail cell and vans with my hands and feet bound. They wrote lies in a search warrant, tied the source of the lies to anonymous individuals and animals that can never be held to account, and then got a judge to sign a search warrant that turned up nothing. They got doctors to write in my medical record that they think "I am a drug packer" despite never finding anything or any evidence to support it.

You will find "temporary" can be long enough to make your life extremely unpleasant, that they can do unpleasant things to your body (another lady at my point of entry was raped, sued, and lost, -- the raping was done to "probe for drugs" and held to be justified), that they can run up debt in your name (what they did to me is just travel around to different ER and tell them an emergency, then bill it to my name, and to multiple hospitals to rack up the debt), that they can put you on a list so that you have no hope of making any airport connections for many years. I don't even bother scheduling same-day international connections anymore, and I have to plan on family members and animals being taken care of for at least 72 hours in advance before I cross the US border.

You later contact a lawyer, several lawyers in fact, only to find out they've handled many of these cases, always lost, and reluctant to bother trying again.

Respectfully, you don't realize how horribly naïve you are. You are not dealing with people that follow the law, rather genuinely evil people that will do whatever they can get away with because they can get away with it and find supreme satisfaction in sadism.

[wat10000]

Why do I get the feeling there’s more to this story....

Anyway, there’s wide gulf between not giving up the passcode to my life and not answering basic questions.

[mothballed]

You'll hear the same "more to the story" if it happens to you, as well. Hope you never have to experience it, but if you do, you'll find the same as me. No one believes it until it happens to them, always "more to the story" or "a lie" or some such right up until they find out reality. Then they find out that "gulf" they thought they saw was a mirage.

[ethbr1]

https://xkcd.com/325/

Except CBP harassment instead of a bobcat. Only 1-in-30 people will ever know there's a serious problem.

[mattlondon]

I think the "worst case" won't just be losing the phone. Do you think they'll get to the stage of keeping your phone but then let you walk out the airport as if nothing happened?! You will have just had a serious, high-risk, and unpleasant altercation with the border officials they're not going to let you just leave without any further action. You'll very likely have your phone taken away while you are detained for "further enquiries" because your actions have just given them totally justified reason to suspect you're worth investigating further.

You may not be convicted for obstruction in the end but wow they will make things horrible for you right up until the court case is dropped at the last minute.

From that point on, every further interaction you have with any officer or official is another high-stakes situation for you where they will be looking to build up a case against you. Every word you say, every slip of the tongue in the interrogation room, the prison van, the holding cell at the station, your complaint at the cuffs being too tight, about needing to go to the bathroom, etc it's all being recorded and used by THEM to paint a picture of THEIR CHOOSING about YOU and build a case against YOU. They are actively trying to trip you up and get you to say/admit/confess to anything and they are professionals who are highly practiced at this and I assume - with respect - that you are not trained to withstand hostile interrogation and incarceration, even for short periods of time while they "straighten things out down at the station".

If you are in that situation I highly recommend you REFUSE to saying a single thing to anyone without legal representation (assuming that is even an option in the country where you decide to be a jerk) because they're out to get you for something, even if not the original thing they took you in for. Be extremely careful about what you say without legal representation.

Good luck on your next flight. Remember that there are different counties at both ends of an international flight and the laws are different in different countries - the laws you are used to at home don't apply elsewhere.