if I was travelling abroad I would not be bringing anything that has universal access to my accounts or data (primary phone for example). I would most likely get a new device loaded only with what I needed to get things done using a new account I transferred money into. For the most part I would not expect any issues but the laws at most borders, even US international borders generally say they can clean you out of all your data and force you to log into any devices you have with you. So the 2 countries mentioned are only part of the story when it comes to privacy when travelling international.
And they are going to know the differences between my flagship loaded with creds and the base model i just bought and loaded just the travel apps? I didn't say don't bring anything, I said don't bring anything with real access.
I don't care about privacy more than I care about having my gear confiscated and it taking months to return should they decide to make me thier day.