Phone Arena has posted an image of Best Buy’s inventory system showing three new AT&T phones with codename “Project Charlie". According to the website, the three new SKUs could possibly be new version of iPhone that Apple will announce in June. And the reasoning behind three models might possibly be different colors or memory capacities. We weren’t able to confirm with our sources whether Project Charlie is a codename used by AT&T for next gen iPhone. However, our sources told us that AT&T has already started testing the next gen iPhone on their network.

In other Apple rumor, Hardmac is reporting that future iPhone models will have exactly same shape and size, and Apple will refresh iPod nano and touch in September. Both the devices will get camera, similar to the iPhone. Again, our sources didn’t have any information about either iPod touch or nano, but they said that iPhone would see major under the hood improvements like better application processor, better graphics engine, more RAM / memory and higher megapixel camera.

We will find out more about iPhone in June, as Apple will introduce the new device in June and start shipping it in July.