I'm at a loss on why my data usage has more than tripled using my iPad 4 over the Motorola Xoom I was using. I don't do anything other than browse the Internet and download a few apps once in a while yet based on my normal tethered usage to my cell phone via the hotspot my iPad is constantly using 3 times more data usage over the Xoom. Why is this so when both tablets are being used for the same purpose?