The resources you link to are helpful; however, this is not really practical advice for most people most of the time. To the extent that our smartphones are a very helpful device to have in our day-to-day lives at home, they're even more useful in a foreign country where they become our only available computing device; indispensable for keeping in touch back home, navigation on unfamiliar transit systems, translation of unfamiliar languages, and so on.

Of course, with great effort and moderate expense, you could setup a burner phone with access to many of your same accounts and resources, but the more features you add to the burner phone, the more it begins to look like the device you're leaving "safe" at home.

I'm traveling overseas tomorrow and my partner and I will both be taking our phones with us as we do every day in our home country.