Next-generation iPhones likely to focus on internal improvements.
AT&T iPhone Customers Can Keep Unlimited Data Plan for Next iPhone
But with the new iPhone just around the corner, several readers wondered if that guarantee would hold even if they chose to upgrade to the new iPhone. It seems like it will.
AT&T has replied on their Facebook page indicating that current customers may keep the $30/month unlimited plan even when they upgrade to a new iPhone:
The good news for current customers who love their unlimited plan is this: they are not required to switch, even when it's time to upgrade to a new phone. So you are welcome to keep your unlimited plan :)Of course, by staying on the unlimited plan, customers won't be able to add on tethering service. See our previous coverage of the new pricing plans for further details.