Okay so I have an iPhone 6+ coming today, but it was upgraded on a different line. (I have 10 lines on my account, it was one that had an edge up available) I want to put this phone on my line. What is the correct way of doing this without jacking up the SIM/activation? I have heard; Simply take my SIM card out of my iPhone 5s and place it into the iPhone 6+ before turning on the new phone. Would this be accurate?