This can be made easier with a secondary discardable-grade phone with the same O/S as your primary phone. Do factory reset and cross the border. Then just sign

This can be made easier with a secondary discardable-grade phone with the same O/S as your primary phone. Do factory reset and cross the border. Then just sign in to your travel phone just like you did when you bought it and switched on for the first time, and it pulls all apps/messages/passwords from the cloud. You'll get at least 95% of your real phone synced to the travel phone. Back at home, your real phone is untouched and you can just switch back to it without having to set up anything, or losing any local settings. Then stash the travel phone until the next trip.