I think this is the case, but want to be sure as my buddy said his dad had a problem. If I order my wife a new 4S now, her current phone will continue to work until it is actually activated on Christmas, correct? My buddy was saying his dad had his old phone stop working before he activated the new one. I don't quite believe him, but he was adamant about it. Sorry for the dumb question, just want it to be a surprise. I don't see how he could have been right because you have to set the phone up before you can use it so there is no reason the current phone won't continue to work until activation.