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In Pictures: Inside the Apple iPhone

PC World breaks apart Apple's iPhone to analyze the device's internal components.

Melissa J. Perenson, PC World

Insert SIM Card Here

This closeup shows the bottom of the iPhone's applications circuit board. The open slot (1) houses the AT&T SIM card; the iPhone not only is locked to AT&T service, but it's also locked to the specific AT&T SIM card that comes with it. We tried inserting a non-iPhone AT&T SIM card--and the phone wouldn't recognize it. Hidden under (2) is 8MB of multipurpose flash memory--which is in addition to the iPhone's 4GB or 8GB of primary flash storage.
Photograph: Chris Manners
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