AT&T is letting some longtime iPhone users sign back up for its $30 unlimited data plan after having switched to one of the newer tiered options, according to an Associated Press report. The report claims that AT&T has allowed iPhone subscribers who have had an unlimited data plan in the past—as in, prior to the company’s June 2010 switch to tiered data pricing—to switch back to the plan. It cites Jose Argumedo, of Brentwood, N.Y., as an example; Argumedo and a friend, who are both iPhone 4 users and who owned iPhones prior to the new handsets, were switched back to an unlimited plan after a call to AT&T customer service. AT&T did not confirm the option to return to an unlimited plan, according to the report; Verizon recently announced that it will offer early iPhone purchasers a $30/mo. unlimited data plan, although it did not provide specifics as to how long users will have to sign up.