I'm sorry that you are having issues with your phone. It seems that your bottom mic may be malfunctioning needs to be replaced. Contact your local Samsung authorized repair center to have it replaced. The reason why it works when you are on speaker is that it utilizes the top mic instead of the bottom one. I hope this is helpful, leave a like if it was and mark as a solution.
Thank you for reaching out. There are a few things that can cause issues with the microphone on your phone or tablet. For example, an external device such as headphones may be preventing the microphone from working.
If the troubleshooting above doesn't resolve the symptoms you are experiencing, a service repair would be recommended. You can take your device to your local UbreakIfix or ship the device in for service.
If you wish to ship your device in for service, can you please provide me with the following information so I can assist you further: http://bit.ly/2JH2rq2
Full Name:
Street address:
Email Address:
Best Contact Number:
Alternate Telephone Number: (If Available)
Model Code:
Serial/IMEI Number:
Be sure to click " ✓ Accept as Solution" when you find an answer that works for you.
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After trying some of the software fixes that's been provided if your device’s microphone is still not responding properly after these troubleshooting steps try this link for a Samsung Authorized Care center near you.
