Hello, I understand how frustrating it is when the mic of the phone is not working. This article provides four sections of troubleshooting with several steps within each one. https://www.samsung.com/us/support/troubleshooting/TSG01001249
Please follow each section step-by-step for the best possible resolution.
Once the troubleshooting is complete, if the mic is still not working then it is recommended to have the phone evaluated by a certified technician. You can use the following link to find a list of service centers in the U.S. that can do the repair: http://www.samsung.com/us/support/service/location.
If the phone needs to be shipped in for service, you can contact customer support at 1-800-726-7864 to create a ticket, or by reaching out to our Facebook or Twitter Support teams or our Live Chat team. Please note, Samsung does not provide loaner devices during the service process. Ship-in service is approximately 7-14 business days, including the ship times.
For service outside of the U.S., please use this link: https://www.samsung.com/us/common/visitlocationsite.html.
As an option for a temporary or replacement device, I recommend taking a look at the certified renewed devices available here: https://www.samsung.com/us/mobile/phones/all-phones/?shop=Certified+Re-Newed I do apologize for any inconvenience.
since this is happening in variety of apps, and not just one app... this is likely a hardware issue.
Did you shoot pressurized air into the mic holes or the speaker grills trying to clean dust? if so, don't do that in the future. the pressurized air can damage the membrane of the mic and cause mic to fail or distort.
visit an authorized repair center to have the mic part checked and replaced. if it's not a hardware issue then submit error report to Samsung Members after reproducing the issue.
hope this helped.
I'm having the same issue and I see a good deal of others reporting as well on Reddit. Looks like a design flaw, not the user "shooting air into the microphone holes."
im having same problem, but in some apps like call voice not happen, only whatsapp and voice recorder apps, flex mode not work at all and i suppose is last firmware update cause this problem.....