So I picked up a new 6+, and I was told I could take it home, connect to my wifi and use it to "play" around with. I didn't want to set it up with a sim card, because I want to be sure I am comfortable with a large screen phone. I thought I'd try it this way, while still having my fully functioning iPhone 5 with me as I use this for business. The Apple rep concurred, but after getting home, it asks to install a sim card and I can't go further. Any ideas?