Upgrade Question

I am part of a family talk plan currently at att.

I want to get the new 3g iphone, but am not eligible for upgrade.

However another line on the plan is a 2g iphone with eligible upgrade.

The person who owns this phone lives a decent distance away.

I would like to know if i can use their upgrade to get the $199 deal on the 3g iphone, and transfer it to my line, without them having to be there, or messing with their line in any way.

Thanks in advance.

 

nobody knows?