Hi. Is it possible to have your phone number on 2 separate phones? The reason why I ask is that I am a bit concerned over the iP4s battery. I do not own a smartphone yet, just a dumb phone (circa 2006 but still gets 3-4 days on a single charge and is currently on a pre-paid plan) and a 3G iPad2. if possible, I would use the dumb phone as a backup to my iPhone and not have to worry as much about draining its battery. or, is my worrying about draining the iP4s battery in 1 day not really an issue? It's kinda hard to tell based on what I have read in these forums. Thanks!