[TheOtherHobbes]

But this makes it very obvious you've reset your phone. Which is a red flag - although not technically illegal, so far.

You really want something that looks like an in-use device and gives no hint that you have sensitive files stored anywhere else.

[fapjacks]

It would have been configurable. The important thing is that your blob of data (e.g. VeraCrypt volume) is offsited and wiped. You could leave your laptop otherwise completely lived-in, just not containing your data anymore. Otherwise, I've worked for companies that gave out loaner phones for overseas travel. A factory-reset phone is much less suspicious than a threadbare "factory-reset" laptop.