Got a quick question, hopefully someone knows the answer, I have an iPhone 5S and am trying to get a 6+, I have 3 other lines on my account that are eligible for upgrade and I'm going to do an upgrade swap to my line. Does anyone know if I scoop up a phone from Apple's reservation site using another line, will I be able to swap the SIM card activation when I get to the Apple store? Someone please enlighten me more