A chunk of code found within Apple’s iOS 4 suggests the company is preparing to field test next-generation iPhone and iPad units. Boy Genius Report claims that the code, found by one of its Apple sources, queries the device, and automatically activates it should it be an unreleased device, bypassing the need for connection to iTunes. The report claims that the unreleased models are CDMA flavors of the iPhone and iPad, but also notes that similar…