Engadget reports the next iPhone is already in testing and their "trusted source" had the opportunity to get their secret-spilling hands on one.

Here's the rundown :

• The new iPhone will be about the same size and shape as the first-gen model.
• It's 3G. Duh!
• It will have built-in GPS.
• The back will be glossy and black from top to bottom. No more metallic back, as seen on the current iPhones.
• The back will be smoother, less angular, and slightly thicker.
• The headphone jack will no longer be recessed. Yippee!
• The screen size and resolution will stay roughly the same.
• No solid word on battery capacity.
• Could ship as early as July.

Take all this information with a grain of salt, of course. The rumors and leaks should fly fast and furious for the next month, as WWDC approaches.