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My uncle bought a brand new iPhone 4S last week and it is suffering from an annoying problem, side b (not him) hears himself with echo. The error does not occur while using headset or speakerphone, only when using handset.

Is there a fix for that problem?

iPhone 4S
Version 5.1
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Turning the speakerphone on turns off the regular mic's software process. Turning speakerphone off turns the mic's software process back on. So the solution is the good old "turn it off and back on again," but this time "it" is just the mic/audio program, and the only way you have to turn it off and back on is to turn a different mic/audio program on and back off. –  user21920 Apr 21 '12 at 18:57
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1 Answer

A lot of user complained about this problem. It's been a 37 page long discussion on the Discussion Forum of Apple.

I suggest he goes to the Apple Store, explains his problem and hope they come with a solution.

Meanwhile, he can try a simple fix which seems to solve the problem. You can try to press the speakerphone button on and off again when the echo happens.

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I am sorry I haven't mentioned it on the question, the error occurs when NOT using headset or speakerphone. –  Eran Apr 20 '12 at 9:34
No, that's not what I meant. See my image. Sorry for the language though. –  Michiel Apr 20 '12 at 9:41
Maybe my language is a bit incomprehensible. The topic and the fix you're suggesting are regarding to a problem occurs when using handsfree/headset. My problem is when using the handset, the phone itself. –  Eran Apr 20 '12 at 9:49
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