The iPhone 3G’s third sensor, first revealed by iLounge in April, has been confirmed as a second proximity sensor. While the original iPhone offered only two front-mounted —one ambient light sensor and one proximity sensor—the 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 speaker’s right. iLounge has learned that the two-sensor array apparently provides superior face proximity detection than the original single sensor, which under some conditions failed to function properly. This detail and others are included in our First Look at the iPhone 3G.