My daughter's phone is the main one on the account. I guess that happened when she originally added the text message for just her phone a few years ago. We both have I-phones and I bought mine before hers last year. Her's is eligible for an upgrade and mine is April 2011. After much arguing between the two of us (she is 18 and going to college and doesn't really need to spend $300 on a phone when we are paying for things for her college, when she is crying she doesn't have the money for it - although she wants to use her graduation money for it). After much debate, my hubby is finally on my side since the account is our account and we pay the phone bill's - she only pays for texting. So - Can I pre-order the new I-phone ahead of time if I want to use her phone upgrade but put the phone on my #?