That's how the ATT version is. The option exists, but you have to call in to ATT and have it enabled for an extra charge.
I believe for those who want it free, you'll need to wait for registry access... Even then, doesn't ATT eventually find out and back charge?
Makes me wonder. Can a Rogers customer call Rogers and have it enabled for a charge on an ATT phone?
I'm curious though.. I almost feel like a registry edit would be needed to enable Internet Sharing regardless if you have ATT activate it. What actually enables it? ATT clicks a button on their end and it magically enables it? And lets say the enable it, you leave ATT and unlock your same device on another carrier.. Is it still unlocked?