Hi guys, I was wondering if I can buy an Apple Watch, pair it with my dad's iPhone 5S just to activate it and use it as my Apple Watch? I'm thinking about this because I have a 4S but I really want the watch. I don't even care if it's not going to use the other apps (I plan to turn off all notifications, apps, etc) so I can use it to tell time and track my fitness. Is this possible? Thanks!