I had a question if anyone might be able to offer insight that would help. I upgraded through Sprint's website to get an iPhone X for my mother. I'm wondering if it would mess with anything to get a second iPhone through signing up for the iPhone Upgrade Program on Apples website? Almost every Apple Store around me is available for pickup on launch (grain of salt in that) and I was curious if I could get myself an iPhone X through Apple that way without screwing anything up on her plan. It's a single line so I'd just be using her number to go through the process. Will this work?