I'm sure it would start WW3 if he knew I was doing it.
The people who have nothing to hide, hide nothing.
He is very blunt and open about his phones
So take him up on it. His reaction to you telling him what you're doing will tell you what you need to know without even having to actually retrieve them.
Any right to *privacy* went out the window when he had his first A. He can close the door to the bathroom when he takes a dump. Other than that, he needs to be an open book.
WW3 may have already started. You're just making sure it wasn't a nuke.