What is the hole on the top of the 4S?

Discussion in 'iPhone Tips, Help and Troubleshooting' started by parish, Oct 17, 2011.

  1. macrumors 65816

    parish

    Joined:
    Apr 14, 2009
    Location:
    Wilts., UK
    #1
    The 4S has a small hole in the top edge next to the headphone jack. The hole is about the same size and position as the SIM-eject hole on the 3GS, but on the 4S the SIM tray is in the side, so it's not that.

    Anyone know what it's for? Was it on the ip4 too?
     
  2. macrumors Core

    miles01110

    Joined:
    Jul 24, 2006
    Location:
    The Ivory Tower (I'm not coming down)
    #2
    It's a microphone, and it's on the iPhone 4 too.
     
  3. macrumors 603

    gr8tfly

    Joined:
    Oct 29, 2006
    Location:
    ~119W 34N
    #3
    It's a microphone. I believe it's primarily used with the main mic for noise cancelling.

    JI imagine it could also be used in conjunction with the bottom speaker when in speaker-phone mode. If so, it would be easy it to test - simply cover one or the other speaker and see which one works.

    On the other hand, it could continue to function in its noise cancelling function while in speaker-phone mode.
     
  4. macrumors 68030

    Joined:
    Sep 26, 2007
  5. thread starter macrumors 65816

    parish

    Joined:
    Apr 14, 2009
    Location:
    Wilts., UK

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