How many megapixels was the rear camera of the original iPhone? The answer is 2 megapixels.
Apple's first-generation iPhone, announced in January 2007 and released in June of that year, had a single fixed-focus 2-megapixel rear camera. It was intended primarily for still photographs and did not include a flash, autofocus, or optical zoom.
The camera was modest even by the standards of its era, but the iPhone's touchscreen interface and software made taking, viewing, and organizing photos unusually accessible. The phone could associate photos with locations through geotagging, although the original model did not have built-in GPS; location information could be inferred through available network data.
A common mix-up is remembering later iPhone upgrades. The iPhone 3GS moved to a 3.2-megapixel camera in 2009, while the iPhone 4 introduced a 5-megapixel rear camera in 2010. The original iPhone had no front-facing camera at all.