I just received my refurbished iphone from at&t. The wifi works right out of the box and it hasn't prompted me to activate it. If I plug it into my computer to try and throw some tunes on it, will I be stuck activating it? My Verizon contract ends in a few weeks, and I'm just looking to use it as an iPod/wifi, hopefully update the software, and not void the warranty. My understanding is a new one usually won't let you do anything with it until it's activated.