On their website (as of 3/20/06) Cingular says “With Cingular Nation, never pay domestic long distance or roaming charges!” Â That means, with respect to roaming, if your call is routed over another company’s system, you will not be charged extra.
However, after clicking a link to the plan’s fine print terms, one learns more.
*MOUSE PRINT: “Cingular reserves the right to terminate your service if less than 50% of your usage over three consecutive billing cycles is on Cingular-owned systems.”
Translation: If you roam too much, Cingular can turn off your service.