I was planning to use the method where you buy a subsidized phone using an upgrade (purchased through Apple.com for a Verizon phone), and then cut up the sim card that came with the phone and insert my old activated sim in the phone. It worked fine in the past, but it looks like this time, when trying to activate the phone, it detected the original number that was tied to the upgrade instead of just following through to the home screen. If I follow through with the activation, is it going to kill my unlimited data? Ex: I used line "1234" that had unlimited data to purchase the iphone on Apple.com. I was going to insert nano sim with line "5678" into that phone, and cut up the "1234" sim. After inserting sim "5678" into the phone, when I try to activate the phone, I see a new screen I have never seen before that says "You are trying to activate line "1234" If you would like to switch lines, call 1-800-MyApple" Despite switching sims, it looks like they detected the serial number of the phone being tied to the original upgrade.