Well consider that sprint is pretty much the only carrier to actually give unlimited data, even without slowing down the connection after a certain cap that I don’t understand the greed of companies where their phones already have these capabilities and the app simply unlocks that capability. If a user runs over their caps, they will have to pay data overages which can be very costly or even end up with slower connections for other carriers. Basically since to tether your phones many carriers charge extra each month for this option basically Apple is protecting the rights of the carriers to charge for certain services. The bad part is there are a few apps that already offer tethering, but require the phones to be unlocked in some way, which is sometimes easy to do, depending on the carrier. Figure most carriers charge anywhere from $15-$25 a month to tether, the fees collected in overages can be far over that amount if a user were to tether their phone and be on say AT&T or Verizon and run up their data usage. So when you think about it, I think carriers need to rethink their tethering fee and give tethering away for free, or allow a tethering app to unlock it. Imagine all the people who want to use tethering but don’t want to pay the extra money that end up paying the extra money anyways in data overage fees or end up upgrading their plans and paying more anyways. So the carriers need to rethink their fee based tethering.