IPhone 4 iOS 7.1.2 microphone

I bought a 'refurbished' iPhone 4 a while ago. When I first got it the sound on video and other recording apps (slo motion recorder, vine, voice changer etc) worked. Now when I record no sound comes out. There's still sound coming out of the voice recordings and auto rap (app). I have checked settings to make sure the microphone isn't disabled and tried re-setting my phone and neither have worked.
If I can't fix this I find that I won't be able to enjoy the pleasures of a smart phone.

Try doing a system restore with itunes, plug a iphone cable onto your pc with itunes running, turn off your phone, and plug in the cable pressing the home button, its pretty straight=forward from there

  • What is the best external microphone for a iphone? I want to start podcasting using my iphone. I think its better to buy a little microphone. Does anyone know which one is best?
  • Microphone on my iPhone doesn't work, how do I fix it? When I'm not on speaker phone, the person on the other line can hear me. But if I put the phone on speaker, it does not work anymore. I noticed when I was taking a video and the sound afterwards, after speaking loudly in the video, was not working. How do I fix this?
  • My iPhone microphone is not working A week ago my iPhone 4 microphone stoped to work. It just stoped, did not lose it in the ground or something, just stoped to work. When I call someone or if someone call me, they can't here me, but I can here them. But If I turn on speaker, they hear me normally. Do you have any thoughts on how I can fix this?
  • Microphone button on iPhone keyboard? I was looking at the info on the Facebook app and the screenshot image showed one with the keyboard pulled up in that last photo.well next to the keyboard language symbol there was a microphone. Is that for texts or anything? And how dou change that setti g on my phone?