I have been getting some astromical data usage on my iPhone lately and wonder if it might be that my iPad has been automatically downloading app updates while connected to my iPhone via Personal Hotspot. I do connect to my iPhone in this way during my commute to surf the web on my iPad. Can anyone tell me whether or not the iPad does automatic updates while connected to Personal Hotspots? If it does, can anyone recommend a way of avoiding unwanted data usage from this? I greatly prefer doing updates automatically. But can't afford to have them being done via my iPhone.