Recently, my Nokia 920 has had problems with the in call microphone, tellme, and other apps that use any type of voice. Many friends and family would be saying "I can't hear you speak louder", "you still there", "your breaking up", and my favorite "you sound like your underwater". I searched over the internet and noticed this is a prevalent problem that tends to emerge after months to a year of use. Many found one solution in that the Nokia 920 has a mic that picks up your voice at the bottom of the phone and a noise cancellation second mic on the top of the phone located next to the headphone jack;five pin size holes in a circle. What I did was use a duster can (meant for electronics) and thoroughly cleaned all mics on the phone; since, I had just gone to the beach and sand and dust was plugging the mic holes. With the ambient noise mic with a finger over it confirms that the mic needs to be free and clear of debris to function correctly otherwise it will cancel out all sound by not being able to differentiate voice from ambient noise. I did not see a post about this so here it is...feel free to comment. Hope this helps out the community.
Update- I read about newer Lumia models having a bigger noise cancellation hole so I took it upon myself to make the five pin size holes a little bigger with a thumb tack. I did not push on the mic part inside of the phone...only to make the holes a 1mm wider. I have not experience anyone saying they cannot hear me anymore. I figure this to be a permanent fix. So far, I have been using my phone for 2 months with this hardware fix with no problems. I thought I would update everyone in case cleaning the mic didn't work.
Update 2- I have been a part of the developer preview program since the beginning it was created. When I first updated to the developer preview my secondary mic completely stopped working. I soft reset, hard rest, downgraded to previous stable firmware hard reset & soft reset; nothing worked and seemed to be persistent across all software versions. So, I ended up replacing the secondary mic and head jack and it totally resolved my issues. I analyzed the old and new secondary mic head jack and realized there was clear circuitry differences. I assume that Nokia had failing hardware originally in our earlier phones for many of the earlier Nokia 920 and later updated the secondary mics to an improved version.
Update- I read about newer Lumia models having a bigger noise cancellation hole so I took it upon myself to make the five pin size holes a little bigger with a thumb tack. I did not push on the mic part inside of the phone...only to make the holes a 1mm wider. I have not experience anyone saying they cannot hear me anymore. I figure this to be a permanent fix. So far, I have been using my phone for 2 months with this hardware fix with no problems. I thought I would update everyone in case cleaning the mic didn't work.
Update 2- I have been a part of the developer preview program since the beginning it was created. When I first updated to the developer preview my secondary mic completely stopped working. I soft reset, hard rest, downgraded to previous stable firmware hard reset & soft reset; nothing worked and seemed to be persistent across all software versions. So, I ended up replacing the secondary mic and head jack and it totally resolved my issues. I analyzed the old and new secondary mic head jack and realized there was clear circuitry differences. I assume that Nokia had failing hardware originally in our earlier phones for many of the earlier Nokia 920 and later updated the secondary mics to an improved version.
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