iphone 8 poor/sensitive mic during call

I suggest you try the 11.2 update, it fixed the problem for me

The problem is the folding case.I removed mine and my wife said she is hearing me perfectly.

I think i fixed it in a different way. I turned off the noise cancellation, and since then its working fine.

Hi,

Same problem here.

As soon as the voice in the normal bottom microphone get's lower in volume the sound at the receiving side starts to clipp and/or becomes very weak. As soon as you raise your voice to a louder level the sound gets normal again.

Easy test is to put another (receiving) phone (Upside down) on one ear and the Iphone 8 in normal position on the other ear. Make a connection and start speaking/counting loud en than go softer on your voice. At a certain level you will hear that your voice level is suddenly decreasing to a very low level. Keep this level and distance to the microphone while putting the Iphone 8, (the one witch you are calling with) in Speaker mode, you will hear a sudden increase in volume and everything is very clear to hear. As soon as you put the Iphone 8 in normal mode again the sound is very weak again.

I changed my Iphone 8 for a new one and had the same problem, on speaker all is OK but at normal call's low souds levels are clipped.

gr.,

I had the iPhone 7 plus with the same problem. Restored it couple times and it worked fine. Then 8 plus and the same problem. Restore couldnt fix it so got it replaced and now it works fine. So glad my X doesnt have any of these issues

Just an update. Say a post about blowing air to remove any dirt in the bottom mic’s. Just blew on them (no big canned air required) and seems to have sorted out the problem. How dirt could be built up in there when less than 3 days out of the box but it works now.

i have found a solution.

the back microphone near the rear camera lense is being blocked more than likely by your phone case if you have a folding phone case, if you remove it or prevent it from blocking it then it will be working fine.

I tried it and it's extremely fine. this guy initially posted his finding and it turned out to be the case for me.

Quoting him "Okay I had the same problem and I went to the Apple genius bar tonight. What the genius spotted was the wallet case that I am using folds back onto the back microphone when you’re talking on the phone this microphone apparently used for noise reduction and causes it to go immediately muffled sound when you talk on the phone.... Without the case closed over itself at the back it works perfectly. So in might account for some of your problems because mine was exactly the same worked on loudspeaker worked on the headset but was muffled on the microphone...therefore causing this problem. But I think it’s intermittent because the way I hold the phone it’s not always the same and sometimes the back microphone the one near the camera would be exposed and sometimes it would be closed over with the back cover. I took the cover off and guess what it works perfectly. Every time I gave it to Apple to check I took the phone out of the case and gave them the raw phone so it took awhile for them to work out that I actually had a case. Hope this helps everyone. "

let me know if this works.

Hello,

Let it be picked up by Apple and you will receive a new one without the microphone problem.

I had a second brand new Iphone 8 with the problem and got a new one from apple.

This one is perfect.

Gr

Yup. I now have 5 iPhone 8’s one is worse than the other. 3/5 bad mic. Nobody hears me. Unless you screem directly in the mic. I did a test. Call it with another phone, lay the iPhone down, mute the phone your calling it from, brush or rub the 2 mic holes right next to the charger port. One side will emit sound and one won’t. Then wait a second, do that again, and the other side won’t work. Very very hard to tell if it’s ios11.x.x.........5 8’s??? All the same? All out of the box?? Hmm odd.

After 9 days of troubleshooting and tear downs, and 5 of the same phones, I feel it’s a possible software settle/installation that only affects certain 8 models along with the plus and X... it’s not clear what or why this happens 8/10 times no matter what is done to the phone. From my experience and testing 5 phones, it seems intermittent but all the time. Some are worse than others. 2or 3 can work normal for 1 minute then fade out because the dual microphone has a hard time transferring from one side to the other.... if you talk on the left side, its faint. If you talk on the right side its clear and vice versa. Putting on speakerphone then off, fixes but only for seconds. This issue will go for more thorough tes

I have found if I use a calling app the phone is fine and calls are working as they should. This tells me it’s not a hardware issue rather a software issue. Thinking back I don’t remember my phone doing this until after the update that fixed the crackling sound when on a call, which my phone had that issue. I just wish Apple would acknowledge this issue and get it fixed.

The problem is so intermittent you think you fixed it but then it comes back. Right now after putting in the big update from apple our two phones are working right (1 1/2 days). We have carefully eliminated the case as a problem, (mic still failed with case off) but each case is different so you need to test your case making sure it does not cover the mic in back, the two on the base or the one by the ear speaker. We replaced one of the two phones with another brand new one to no effect, using compressed air gently blew out the grills on the bottom mic. Replaced our old SIM cards with new ones. So we just keep hoping the upgrade holds.

After 3 new Iphones 8 and a new SIM card and no cover the microphone problem still exists.

On speaker mode all is OK but making a "normal" call the receiver hears a muffled, fading voice level.

Something to do with software choice of which microphone to use when calling.

I think the Iphone 8 has 3 microphones and the software decides which one to use in according to the input level of the 3 different microphones. In speaker mode this microphone switching goes OK but a a normal call the software fails

Gr.,

I believe I found a fix. I have been arguing with Apple. They have been awful for two weeks. I got lucky and figured it out myself.

The fix was very simple Settings/Privacy/Microphone THEN SHUT OFF ALL THE GREEN BUTTONS.

Let me know if this works ***, you can test it on me