Wondering why previous iPhone versions may never have Siri? Basically, it’s because the iPhone 4S is neurotic, and has an infrared LED in its proximity sensor to make sure it always knows where your face is.
After taking a second look at their recent iPhone 4S teardown, iFixit discovered that Apple included a tiny infrared LED to the 4S’s proximity sensor that enables it to detect your face more accurately.
In previous iPhone models, the IR proximity sensors would only activate when a phone or Skype call was initiated, but the iPhone 4S is seemingly obsessed about knowing where your face is at all times – when the screen is activated, so is the proximity sensor. So, why is the 4S so kooky about wanting to know where your classically attractive visage is at all times? Your faithful servant Siri, that’s why.
iFixit reports, “Siri is ready and waiting to answer her master’s beck and call at any time. And in order to be as attentive as a personal assistant ought to be, Apple had to design the proximity sensor to be as vigilant as Big Brother, but as cute as Little Sister. So whenever the screen is active, the proximity sensor is active too. Thus, whenever you raise the iPhone 4S to your face, Siri is ready to take orders.”
Wow, if the new iPhone 4S and Siri are so clingy that they need to know where my face is at all times, maybe I should’ve just stayed with that really needy girl I dated in high school.