Had my mic go out after 6 months. The guy at the store I went to at least checked it out, but was quick to get the warranty replacement ordered up.

Tried pulling the battery?

Might be a quirk, but maybe it is best to just take the replacement phone.

 

I agree with wgbeatty. I wouldn't try anything with internal setup of the phone (not saying that there's a faulty wire or something like that, but I had a problem with my En3 and since my warrenty was up, I went into my phone and ended up bricking it). Take the replacement phone, because it's better off then having to buy a whole new phone, unless you wanted a new phone.. :/

 

I had the same problem. Is the "speaker" button greyed out during a call? If so, as mine was, your phone believes something is plugged into the headphone jack.

I tried carefully plugging around with a small screwdriver but nothing seemed to help. Finally I found a post somewhere online from someone with the same problem who suggested to take a pair of headphones or whatever and just violently shove the plug in and out of the jack several times. Pull no punches. Works perfectly now.

 

I use my phone for the same thing and it has done the same exact thing. I pulled the audio cable while taking a call and the speaker and mic quit working. I guess it kinda confuses the hardware on what it's supposed to do. All I did was a factory reset by turning the phone off and holding Vol Down+Home+End. This resolved my problem. There is probably no need for getting the phone replaced.

 

Dear neightwulf, I literally registered to this forum just to say THANK YOU, you really saved me. This happened to me yesterday and I searched all over the net for solution (i didn't wan't to reset the phone), nothing helped me. When I saw your post I was like, wtf I haven't tried that and I plugged-unplugged the headphones about a dozen times and the icon started blinking and... IT WAS GONE!!! I can't f+=king believe it, people were changing phones because of this stupid software problem. Finally, the SOLUTION to this problem!

 

there's a little microswitch in the top left side of the headphone jack. i got mine unstuck with a paperclip. already hap a phone replace because of this. now i just don't use headphones