AT&T CEO Randell Stephenson has spilled the beans and confirmed that the 3G iPhone will be available next year.

Excerpt from InformationWeek:

At a meeting in California, AT&T CEO Randall Stephenson told reporters that a 3G version will be available next year. He also said that he couldn’t say exactly when it will be available, or how much more it will cost than the current version of the iPhone, which sells for $399.

With the SDK for the iPhone due for release in February, the expected influx of third-party applications does coincide nicely.

So far, there are more than 1.5 million iPhones sold. Having to wait for 3G iPhones to be available until next year isn’t expected to affect immediate iPhone sales too much though.