I bought the iPad 4 yesterday and within an hour of the first time I used the App Store, and sometimes it wouldn't go to the next page after I clicked it, and it had the little circle shaped icon next to the wifi icon on the top left of the screen. Now it's doing that like half the time I use the app store. I have to force kill the app when this happens and and it's not my wifi because everything else works fine and I know I have good Internet speed. Do you know how to fix this.