Originally my iPhone 5 just monitored cellular data and my tethering usage under one heading. (Settings>general>usage>cellular usage) After an update to IOS6 it separated cellular usage and tethering usage. Ok no big deal, I can still track my usage with a little addition. NOW after the latest update, it only displays my current cellular data usage and tethering usage has simply disappeared. It would also appear that the tether usage this month I used was not combined together with cellular. Implying that it is not keeping track of it anymore. Is this Apples doing or my carrier? Can I get it back?