https://us.community.samsung.com/t5/Galaxy-S21/S21-ultra-microphone-issue/m-p/1695782#M5322 <P>I have an issue as well after several days of using the phone with no issues. Not related to the sim removal tool as has been proposed. This is almost certainly a software/hardware issue.</P> Wed, 10 Feb 2021 13:06:37 GMT besch2410 2021-02-10T13:06:37Z