My dad's first-gen iPhone went wonky, so he upgraded to a new 3G one and activated it. I'm now playing with his old iPhone, which has an unreliable battery, but still seems to work in terms of browsing the web on WiFi, even buying Apps using his account. Are any of these features going to be shut down when AT&T finds out the phone is still being used? Is the old iPhone now a new iPod Touch basically? Are there any disadvantages here I'm not aware of? The phone had an extended apple service plan, it seems to me I could get it fixed at Apple and use it as everything but a phone. Are there going to be any conflicts with txt-messaging, etc.? Thanks!