My girlfriend and I have separate Verizon accounts. She has a basic phone without a data plan on her account which is eligible for an upgrade. She has offered to let me use her upgrade so that I can get the iPhone 5 at the discounted price and so that I don't lose my unlimited data plan.
1.) Will she be able to get the iPhone 5 without changing anything about her existing plan and continue to use the basic phone she has now?
2.) Will I be able to switch over to the iPhone 5 without losing my data plan?
I'm excited that you're getting a new phone! Your girlfriend is very generous!
This is definitely something that you can do, but keep in mind that the warranty directly through us won't be available as it doesn't transfer from a different account. You will be able to contact Apple directly though if you do run into any warranty situations.