Using wife's upgrade for my line, Do i need to call in to Activate?

I'm doing the same thing. When I preordered in store they said to activate through itunes which will deactivate your wife's number and transfer it to the iphone. Next you bring them into an ATT store where they will swap it to your line, deactivate your wife's data plan, and restore her number back to her previous phone.

 

Doesn't have to be done at the store. Notice he said when he pre-ordered in the store, so that's why he was told that. You should be able to call and get it done.

 

Same Situation
Well my idea was activate it on my Dad's line which will deactivate his phone. Then i would get the IMEI Number from his deactivated phone and call AT&T

I would tell them i would like to transfer the iPhone 4 from my Dad's account to my line
[I would recommend saying you used her upgrade to reduce confusion]
Then they would ask for the IMEI Number from phone that got deactivated
Once thats been confirmed, everything should be good to go

 

I dont think you'd want to activate it before calling ATT. I'd call AT&T before doing anything else and have them transfer it and then sync via iTunes. Then there would be no interuption on the phone you are swapping it with?

 

This is detailed in our Upgrade Guide.