How does the iPhone know when you pull the phone away from your face?

Discussion in 'iPhone' started by duelingdragons, Sep 16, 2008.

  1. duelingdragons macrumors 65816

    May 13, 2007
    Orlando, FL
    You know how the screen goes black when you're on a call unless you pull the phone away from your ear, at which point, it lights up??

    Is it sensing heat from your ear, or noise (or lack thereof) coming from the mic?
  2. Zwhaler macrumors 604


    Jun 10, 2006
    There is a proximity sensor next to the earpiece. While on a call you can activate it by using your finger if you wanted, in other words it doesn't use the mic to detect when your face is there.
  3. Rhosfelt macrumors 65816


    Aug 15, 2007
    I don't want to be raped :(
    In other words, magic.
  4. neesh0 macrumors 6502a


    Sep 6, 2008
    Toronto, Ontario
    make sure you dont use a case that blocks the sensors, if you do you are gonna have a hard time hanging up!
  5. rsk137 macrumors member

    Sep 11, 2008
    There are 3 sensors right to the left of the earpiece and one of them controls the function of locking your screen. You can't see them unless you hold the phone under direct light.

    It locks once the sensor is covered or obstructed.


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