On October 13th, when I'm due for an upgrade. I just want to make sure this goes down smoothly, so if anyone can help me, I'd appreciate it. Basically, it's not my phone that's due for the upgrade, it's my mom's on the same family plan. I've upgraded before using another family member's upgrade, and it's as smooth as anything. I was told by someone at the ATT store that this will occur the same way. My phone already has a data plan, so I just want to make sure they don't erroneously add a data plan to my mom's phone so we don't double pay for the month, and that they don't try to stick her the contract that way for 2 years. Has anyone done this in the past utilizing someone else's upgrade. Thanks a lot.