So, I am getting an Xperia X10 soon but I'm only going to be in the US for another year so I don't see the point in subscribing to a data plan. Also, I'm kinda stuck on a family plan right now. Lulz. Regardless, I have full WiFi coverage where I'm at and would only like to use WiFi. I've heard of background data usage on certain phones so is there a way to program the X10 so that it ONLY does data-related tasks when on WiFi?