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The title says it all.

This is a difficult one for me to troubleshoot...in part because it's my son's device and he is in Australia (I am in the US).

This is our primary means of communication. I'm speculating that there is something happening in the headphone jack that would allow this to happen.

Strange is that the headphones that he is using do not have a built-in mic. –

Thank you in advance for helping me with this!

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  • 2
    I should note that the headphones that he is using do not have a built-in mic.
    – Christopher Vigliotti
    Commented May 22, 2014 at 14:21
  • you might want to edit that into the question if you get a chance (edit link above if you are on a desktop browser)
    – dwightk
    Commented May 22, 2014 at 14:50
  • Does the headphone plug has 2 or 3 black rings?
    – Ruskes
    Commented Sep 7, 2014 at 17:24

1 Answer 1

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+50

Following your hint on Headphone jack.

When using headphones only (no microphone) (the ones with the 2 black ring plug) the system activates the built in microphone.

When not plugged in, the system now thinks you plugged in an external microphone and it will not activate the built in one. The reason for that would be a STUCK contact pin in the jack.

It is possible that the pin for the microphone got stuck.

  • Strip down a Johnson & Johnson Q-tip & dip it in alcohol. Insert damp Q-tip in earphone jack and twist.

  • Use a compressed air can (computer store) and blow in it few times.

Do not use metal object inside the plug.

If the stuck contact pin does not get loose you have 2 choices:

  • use headset with microphone

  • open iPhone and repair the plug. (that is rather a complicated process!)

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