I have a 5s, and thus am not eligible to upgrade to the iPhone 6 at the full discount until September next year. However, in my family plan, my mom's line is upgrade eligible (and has been probably for 6 years haha). She has a really old flip phone that she just loves and still works. I contacted AT&T Chat support, and they told me I can pre-order the iPhone 6 for my mom's line to get the upgrade pricing. Then when the phone arrives, before I even open it, I need to call AT&T and they do something in their system to swap the number on the new iPhone 6 to my number, and then I activate it. All the while my mom's flip phone knows nothing happened. Is it really that simple? I keep my Unlimited data, my 2-year contract stays the same, and my mom has a new 2-year contract?