I am currently traveling in India and activated the unlimited international data plan that was available to us under a corporate account on AT&T. Prior to this change I had the 4GB tethering plan.

I am currently roaming on Aircel 3G in India and it looks like I can turn on the personal hotspot on my iPhone and tether my iPad!

Is that a mistake in my account setup? Will AT&T lynch me with exhorbitant costs if I do tether?

Any pointers will be greatly appreciated!