Weird Microphone Issue

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http://forum.xda-developers.com – Hi all, wondering if someone can help me figure this out.... My microphone isn't working regularly.People can not hear me on phone calls. It won't record, video has no sound, no Google Now voice actions, etc... But... it works on speakerphone (I've google that and comes across many instances of that problem) It also works if i plug a microusb cord in the port. Thats the strange one. If i plug, let's say, the usb cable into the phone the microphone works normally. The cable doesn't have to be connected to anything else, in fact, it works better when it is not connected. The microphone (HowTos)