They can deny entry to non-citizens for basically any reason, including "you have a wiped phone and won't give us access to your cloud account", so... yeah prob

They can deny entry to non-citizens for basically any reason, including "you have a wiped phone and won't give us access to your cloud account", so... yeah probably best not to do that. Or at least make up a plausible reason for it. I think a better option is probably just to delete any app that might have critical comments on it, like social media etc. And then you can just say you've quit social media.