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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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no mics working on iPhone 4 gsm

i have an iphone 4 with a strange problem. the microphone does not work during calls, on speaker phone, and the headset. it does not work for apps either. essentially none of the mics work

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None working would indicate a damaged IC chip or water damage. Either way you will need a professional to repair it unless you want to have a go yourself.

There are two mics in the iPhone so first step is to find the guide on here and replace both - if that fails your IC has gone and will need replacing - something for a professional.

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