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How to upgrade your AT&T unlimited iPhone 4 plan to unlimited iPhone 4S plan

We are hearing numerous reports that AT&T unlimited data users aren’t able to upgrade their unlimited plans when they order the iPhone 4S. They are automatically changed to a different data tier (in the above case, the $30 data).

Update: It appears the upgrade is just a bit more complicated. You have to remove the “unlimited data for iphone” plan and then they’ll let you add an “unlimited data for iphone 4S” plan. Yes, unnecessarily complicated and is causing some users to lose their unlimited status.

Update 2: AT&T has chimed in: All current AT&T smartphone customers with an unlimited plan can upgrade and keep their unlimited plan. We’re working on making the online page more clear, but if a customer keeps clicking continue, they will see their unlimited plan.

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