Editor's note: This story was updated at 12:33 PT with a correction. The error message preventing iPhone 4S buyers from keeping their unlimited data plans was limited to the company's mobile site. The story was also updated at 12:50 p.m. PT with a comment from AT&T and further clarification.
Are you one of the many iPhone-owning AT&T wireless users pre-ordering a new iPhone 4S today?
If so, you may want to hold off from ordering through AT&T's mobile Web site, for now anyway. Those looking to upgrade their existing iPhone 3G, 3GS, or 4 will notice that AT&T removes the option to grandfather in their existing Data Unlimited for iPhone plan when moving up to an iPhone 4S. Fortunately, everything seems to be fine when attempting the upgrade process in a non-mobile browser.
Even on the regular Web site, it seems the wording on the AT&T page is a bit confusing, according to GigaOM. Some users are getting tripped up over this statement they see while checking out: "Your new device requires a different Data Add-on Plan than you currently have. We selected a compatible Data Add-on Plan for you. If you want a different plan, you can change the Data Add-on Plan by selecting Change here or from within my AT&T after you receive and activate your new device."
An AT&T representative reached out to CNET regarding this story with this clarification: "We're working on making the online page more clear. We are not removing grandfathered unlimited data plans."… Read more