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?

Have you tried turning the system off and then back on again?

Also, is it jailbroken?

Get the latest update…
Go to: Settings > General > Software Update

Hope this helps!

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