...John. It's the future. Keyboard phones are old. Still, Prompto takes it and blinks at the keyboard when he finds it, turning it over. "Man, this is ancient stuff!" before nudging John to unlock it. After that, he starts going through the settings to try and hook John into their private photostream.

"So uh, who's Harry?" He looks down at the phone, working and thinking, then suggests, "brother?" John would have said if he was a dad, right? Kinda new for someone older than John to have so another 'Watson'... brother makes sense? Right...?

It isn't long before he beams and offers it back. "There you go! All set!"