My parents both have iPhone 4s on my AT&T account, and they want to upgrade to the 6. I know what they want, so I was going to swing by the Apple Store on my way home from work tomorrow, there's no need for them to be there with me. However, I don't want their old phones becoming deactivated until I get a chance to give the phones to them. When I bought my 6 online, my old phone/SIM card was active until I turned on the 6 for the first time and went through the activation process. Is the same true for phones bought at the Apple Store? I'm worried if I buy the phones tomorrow, I won't be able to get them to my parents until sometime later this weekend and they'll be without working phones until then. Thanks.