Yes, T-Mobile has sued Starbucks, and it’s over wi-fi, but it’s not over the fact that Starbucks is dropping T-Mobile in favor of AT&T. It’s over their new “free wi-fi” plan that was just unveiled this week.In the lawsuit, filed late on Thursday in New York state court, T-Mobile alleges that AT&T and Starbucks Corp are not living up to an agreement the three companies reached over how Starbucks should transfer from its T-Mobile partnership to a new partnership with AT&T announced earlier this year.T-Mobile