How to activate my new iPhone? - 1

I just got a new iPhone from my dad (it is an iPhone 4 by the way, that was ordered online) and it is using my old number from my old phone. Upon turning on the iPhone and setting everything up, I noticed it skipped the activation step and still said "No Service" at the top. After the setup had finished a notice bubble popped up and read "Can't activate service, settings have changed" (I'm not competently sure if this is a 100% correct or not)

After all that, I looked in the box the phone shipped in (not the actual iPhone box it self) and found a document instructing me to go to: www.att.com/bizactivate to activate my phone
I tried the website and it wanted my order number, and my activation number, and that this information was sent by email. I could complete this step, but since my father is the one who ordered the phone, the information is in his email, and he is on a flight. I don't know when he will land.

So does anyone know anything about this, or around this? Or even why my iPhone can't activate it self… Please Help!

Call customer service

Well, you can go to the store which is at & t and ask them how to activate it.;)