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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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Microphone and earpiece not functioning in calls. Intermitten.

iPhone 4 GSM AT&T. I have already replaced the charging port once with an OEM part. It is not a service issue as it works perfect in another iPhone and I have switched SIM's and reprovisioned.

1) The microphone works 100% of the time in Voice Recorder.

2) Every now and then (about 1/3) when a call is made the speaker phone button will be white as if its already turned on.

When this happens, you cannot adjust volume in the call (press volume buttons and nothing appears). I have tried tapping the speakerphone button off and back on. No sound or microphone at all, doesn't matter if speaker on or off.

3) The other 2/3's the call is made fine and the microphone and earpiece work and the speakerphone button is not white as if turned on and the volume adjusts.

I'm thinking possibly noise cancelation microphone (power button flex?) or a software glitch. I have not tried a restore yet, only a update, just looking for some possible input.

Answer this question I have this problem too

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I have a similar problem both ear speaker and mic won't work. I've tried replacing both but still the same. Also mic works in voice recorder

Would like to know a fix

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Is it intermitten on calls, or is it every call you make?

In the next week I will be trying the noise cancelation microphone (replacing the power flex ribbon) and a DFU restore. I will let you know if I have any sucess. Was just hoping for someone on here to be like "Hey, I had that problem... This fixed it :)" lol

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Matt will be eternally grateful.
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