I think there is just some confusion in the verbiage! If you read the first line of the description, it says "even if you're stating at home" which is indicative of making calls at home from in the United States, not while roaming. It also mentions the feature as "Stateside" which means when in the states!
Roaming is used to indicate making calls outside of the states!
That said, we need to get that 400 request looked into, and we can definitely pass the feedback along about the confusion!
Please let us know if there is anything else we can help clarify!
I agree with you there is a confusion that can put TMO into trouble before getting 400 angry customers as it is clearly false advertising. Bad marcom strategy can have lots of unsuspected negative collateral impacts.
At any rates, maybe the details are explained in that page that is not accessible, so at least have IT fix the broken URL.
I am sending the feedback off for both of those pieces. Thanks for bringing it to our attention!