[hyperdimension]

You are right IIRC for most companies; my DID provider does charge incoming (toll/toll-free differing)/outgoing (flat rate) calls different rates.

That being said, are we not talking about AT-and-freaking-T? :) Surely they'll've been able to work things out. I think, anyway.

[bigiain]

Yep. Surely the phone system costs for AT&T calling their own customers is so close to zero as to not matter even at telco scale, compared to the minimum wage they're paying the people on their end of the call.

(Also, isn't there some weird thing in the US where cell phone users get charged for _inbound_ calls? They might even make money on these...)