Any solution involve rooting isn't a problem. Although because of a lack of SD card, I have only been able to unlock it and plan on rooting it once I buy one. But it'd be nice to know how at least until then.
It has Go Launcher on it now and uses the weather live wallpaper. This is actually why I'd like to remove the big "No Signal" message. It might seem like a stupid reason for it, but I want to make my phone look nice.