Primary microphone does not work, microphone with WhatsApp, Skype ok

Tags: #<Tag:0x00007fefc3c22b20> #<Tag:0x00007fefc3c22760>


Hello everyone, I am writing know about this issue that unfortunately has been there since the beginning when i bought the fp2 (July 2018).
The primary microphone, the one i use for the normal call has very low volume: the people I talk to always complain because they cannot hear me well, while if I use WhatsApp or Skype the sound of my voice is ok.
What should i do? Reboot? Change some parts?