iPhone 4 screen changes brightness

Discussion in 'iPhone' started by dimka15, Aug 16, 2010.

  1. dimka15 macrumors newbie

    Aug 16, 2010
    Hi All,

    Does anyone has the same experience:

    During beginning of the call ( after dialing) the screen changes its brightness rapidly 2 times, sometimes.

    This could be an attempt to recalibrate the proximity sensor. However, I can see this also if I use bluetooth.

    It does not happen always. Just from time to time.

    Thank you.
  2. OneMike macrumors 603


    Oct 19, 2005
    Settings > Brightness > Auto-Brightness

    I don't have this occur during calls (that I can remember). It does happen just about every other time though.
  3. dimka15 thread starter macrumors newbie

    Aug 16, 2010
    Auto Brightness never changes the brightness rapidly. So, this is not auto - brightness.
  4. nooaah macrumors 68000


    Sep 3, 2009
    Philadelphia, PA
    This happened to me when I turned auto brightness on for my girlfriend. I think you said auto brightness is toggled off for you, though. I don't really know -- but, again, my phone showed this type of behavior when I put the phone on speaker while in a call and tried to use Safari (with auto brightness on). This never happened with auto brightness off and only with iOS4.

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