Posted June 13, 2008 at 10:58am by iClarified · 7444 views
The iPhone 3Gs third sensor has been confirmed as a second proximity sensor, according to an iLounge report.
"While the original iPhone offered only two front-mounted one ambient light sensor and one proximity sensorthe iPhone 3G sports an array of three sensors (two proximity sensors, one ambient light sensor) in a J shape to the left of the ear speaker, moved from their original locations above and to the speakers right."
The third sensor was added to provide improved face proximity detection.