@GenGaara in order to rule out an hardware issue, try to restart your phone in safe mode. Will your mic pass diagnostics? Can you call people and people can listen you?
As @YoGem suggested you can also run the test in safe mode. However, if it still doesn't work it is pointing towards this being hardware related. You can also try a software repair using Xperia Companion but if this doesn't help you can contact your Local support for more information on how to proceed with getting your device sent to an authorised service center.
Let me know if you have any further questions about this.
Tried diagnostic again in safe mode, still failed. People can't hear me during calls, voice recordings don't work, google assistant and voice search unresponisve. Nothing works with regards to the mic.
@GenGaara I'm sorry to hear that. In that case, please try a software repair, as suggested in my earlier post, and if this doesn't help you can contact your Local support team to have your device repaired.
