https://community.sony.rs/t5/other-general/mx4-headphones/m-p/3778356#M62494 <P>When using the headphones callers say they cannot hear me via the headphones - is there a fix or is this a problem with the MX4’s</P> Sun, 28 Feb 2021 09:54:27 GMT Jhngwlsh 2021-02-28T09:54:27Z https://community.sony.rs/t5/other-general/mx4-headphones/m-p/3778356#M62494 <P>When using the headphones callers say they cannot hear me via the headphones - is there a fix or is this a problem with the MX4’s</P> Sun, 28 Feb 2021 09:54:27 GMT https://community.sony.rs/t5/other-general/mx4-headphones/m-p/3778356#M62494 Jhngwlsh 2021-02-28T09:54:27Z https://community.sony.rs/t5/other-general/mx4-headphones/m-p/3779293#M62495 <P>I don't think this is a problem with all M4's. Have you made sure they are up to date using the Headphones Connect app?</P> Tue, 02 Mar 2021 16:24:37 GMT https://community.sony.rs/t5/other-general/mx4-headphones/m-p/3779293#M62495 Win_88 2021-03-02T16:24:37Z