It can. You are just required to sign a new 2 year contract on the line that has the available upgrade. What you do with the phone after that is your business.
truestory.jpgOP probably got into a huge fight with his wife about this, trying to act all smart and **** and now he has to break them the truth that he, in fact, was the one that was wrong.
that's why he needed to post a few times for reassurance.