The microphone on my Acer Liquid Z5 not working. How to fix?

Phone was working fine, then I put the second sim card in, people cannot hear me

It could be a hardware or a network issue. If hardware, contact Acer to find out how you can get your phone repaired. If it's a network issue, contact your carrier to report your problem. Hopefully one of them can help you out. Good luck!

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