Xperia SL mic problem

[anamsid_]

Hi,
My Xperia SL's mic is not working while making phone calls for last few weeks. It can record audio in recorder app, but it does not work on call. I have to always use headset for calls which is annoying. Is anyone else also facing this situation? Any solution? It does not look like a hardware problem to me, but do I need to take it to Sony Service Center?

Thank you.

[Rickard]

What happens if you try the microphone in this app?

https://play.google.com/store/apps/details?id=com.sonymobile.androidapp.functiontester

[anamsid_]

I downloaded the diagnostic app. Microphone test fails for low volume sounds like my own, but is successful for loud sounds like 75-100 units of volume from my laptop.

[Rickard]

Have you checked so that there's no dust or dirt in the phones microphones? You can see their location on page 8 in the manual: http://www-support-downloads.sonymobile.com/lt26ii/userguide_EN_LT26ii_1_Android4.1.pdf.

If it's not dust or dirt causing the problem i recommend that you contact a service location or local Sony Xperia support (http://www.sonymobile.com/global-en/support/contact-us/) for assistance.