Here's what I'm trying to do and I wanted to make sure it all makes sense: 1. I'm on a family plan where we all have unlimited data 2. My line isn't eligible for an upgrade yet, but one of the other lines is and she barely uses any data 3. I'm going to preorder with the other line and when it arrives I'll activate it on my line 4. When I order with the other line that's eligible I'll switch that line to a 2gb plan since it will be an upgrade 5. I'll get to keep my unlimited data on my line AND I'll only have to pay the discounted upgraded price Will this work and does it all make sense? Thank you in advance!!