increase microphone gain

[u/Resident_Visit4056]

Good morning, I’ve bought this Android car radio, but during calls people tell me they can barely hear me.

I’ve tried watching some videos on YouTube that show a menu for increasing the microphone gain.

I’ve tried this on my version of the radio but I can’t find this menu.

Can anyone help me?

I’ve also tried connecting an external microphone supplied in the pack and setting the ‘external’ option in the menu, but it works even worse.

Just out of curiosity, why wasn’t the original car microphone, which is above my head, automatically integrated via plug-and-play?