I would be very cautious with that. Crossing border and going through border control (in this case TSA and they've got a reputation...) with a phone back to fac

I would be very cautious with that. Crossing border and going through border control (in this case TSA and they've got a reputation...) with a phone back to factory settings and no content doesn't look like something border control would just let pass. I can't believe they wouldn't find that suspicious and go to even greater length to control and search you just on that basis.