Mi 9T Pro microphone stops working - Redmi K20 Pro / Xiaomi Mi 9T Pro Questions & Answe

My phone's microphone stops working a few minutes after starting the device. You can talk normally, but after a while the microphone stops working and you cannot hear the interlocutor in the handset. Restarting the phone helps, but after a few minutes the same thing happens. I have already tried to downgrade to Miui 11, tested different ROMs, but the same thing happens in all of them. In addition, when I connect the headphones to the mini jack port after the microphone stops working, I hear a continuous noise and the phone does not detect the headphones. I have already checked the main and top microphones in the CIT and after starting the device it works normally and shows the volume level correctly, but after they stop working, the meter shows 0 all the time and does not respond to the sound.
The strangest thing is that the phone worked fine after purchase. Problems started happening after upgrading to Miui 12.5
Is it hardware or firmware damage? Do you have any idea how this could be fixed? I was thinking about buying a USB board with a microphone and replacing it, but if there is a problem with the firmware, there is no point in disassembling the phone.

Related

Help with sound issue

Hope somebody can help please? My Zuk Z2 Pro has lost the earpiece sound when on a phone call. People can hear me, but I cannot hear them. I am sure its a software problem but not sure how to permanently fix it.
I ran a manual engineering test by typing *#*#1111#*#* and checked the speaker and the microphone in settings, they are fine. However, the ‘Rec’ setting wont play any sound to the earpiece.
I have read its a known issue and installing the app mswitch (keycut) worked,but it didnt. I then read about switching off "OK Google", well on a Zuk this is not easy to find, so am not even sure I was able to disable this app.
EDIT: After more investigation I have found that when I turn the voice volume up in ringer settings it does nothing, which I think may be the speaker itself. My wife has the same phone and hers works normally. There are three ringer volumes, and the middle one does nothing but I know it did yesterday
I then tried another app called "Soundabout". This worked and allowed the Rec setting in the engineering side of the phone to play a sound, like an increasing oscillalation of sound. I then restarted the phone and it worked, but not permanently. The app doesn't seem to stay working.
However, when I made a phone call the earpiece speaker still didnt work. I could not hear anybody but they could hear me.
However, it does work when headphones are plugged in.
Does anyone know if a factory reset of the software would help as I am stuck and desperate for help. It just suddenly stopped working yesterday, so am puzzled as to why. The phone is just less than 12 months old, so not particular aged and it has always been in a case and well looked after. Its running stock Android 6 with the ZUI overlay from Zuk, so no changes made to it.
I have de same problem. Two months ago the speakers decreased the volume and microphone does not work properly.
I replaced the usb + mic piece, but the problem remains the same. Now, I have ordered speakers piece, but I guess the problem will continue.
The only thing I can think is the origin of the issue could be the bluetooth earphones that in some way had changed the sound configuration.
Try to qfil ZUI 1.9, if that does ot help then its hardware problem most likely.
Tomthered1 said:
Hope somebody can help please? My Zuk Z2 Pro has lost the earpiece sound when on a phone call. People can hear me, but I cannot hear them. I am sure its a software problem but not sure how to permanently fix it.
I ran a manual engineering test by typing *#*#1111#*#* and checked the speaker and the microphone in settings, they are fine. However, the ‘Rec’ setting wont play any sound to the earpiece.
I have read its a known issue and installing the app mswitch (keycut) worked,but it didnt. I then read about switching off "OK Google", well on a Zuk this is not easy to find, so am not even sure I was able to disable this app.
EDIT: After more investigation I have found that when I turn the voice volume up in ringer settings it does nothing, which I think may be the speaker itself. My wife has the same phone and hers works normally. There are three ringer volumes, and the middle one does nothing but I know it did yesterday
I then tried another app called "Soundabout". This worked and allowed the Rec setting in the engineering side of the phone to play a sound, like an increasing oscillalation of sound. I then restarted the phone and it worked, but not permanently. The app doesn't seem to stay working.
However, when I made a phone call the earpiece speaker still didnt work. I could not hear anybody but they could hear me.
However, it does work when headphones are plugged in.
Does anyone know if a factory reset of the software would help as I am stuck and desperate for help. It just suddenly stopped working yesterday, so am puzzled as to why. The phone is just less than 12 months old, so not particular aged and it has always been in a case and well looked after. Its running stock Android 6 with the ZUI overlay from Zuk, so no changes made to it.
Click to expand...
Click to collapse
Finally I have found the origin of the problem. It was in the dust filters of the phone. I used an special liquid for the screen protector. Some of this liquid goes to the filters. I have cleaned this filter with a brush teeth.
It is silly and I feel dumb.
Simple fix
Please do not feel dumb or stupid as this is something we don't think about.
The problem is due to dust and fabric accumulation. I just had this problem.
The fix is simple.
Use something soft to bang your receiver. In my case i used the tip of my finger. You want to the bang to be good but not to break the glass. My finger hurts a bit so I think a small rubber hammer will do the job.
Hope this helps.
Clean earpiece protector
Hi, I had the same issue and after trying all software tweaks with no success, what I have done is use a toothbrush to clean the tiny holes from the earpiece protector. I pushed some brush bristles gently through the holes and... it worked!!!
Hope it helps.

Ear speaker issue

Hi, I'm having a problem with my newly purchased A2. When I make a call the ear speaker does not work, I activate and deactivate the loudspeaker or headphones and there the ear speaker works. The problem happened in Oreo and Pie. I wanted to know if something else happens to someone else or is the hardware that is wrong.
Thanks!
Yes I am facing the same problem, after the OS Update, the earpiece of my Xiaomi Mi A2 mobile has stopped working.
(ignore, upon closer reading the issue appears to be different -- the earpiece starts working upon toggling the loudspeaker, something which didn't happen in my case)

AUDIO and MIC not working until restart

Hi,
I have a MI9 6/128 with the original ROM MIUI GLOBAL 11.0.6 | Estable 11.0.6.0 (QFAEUXM)
Sometimes i found that the audio and the mic of the phone is not working so in the call i cannot hear the other person and the other person is not hearing me. This problem appears without any reason and when i restart the phone is fixed for some time., but maybe later o other day the problem appears other time without any advice.
What could be happening?
nobody?
got this problem too long time ago
but that time i install magisk for mod audio speaker
now my mi 9 just back to hand after fix locked bootload er miui wrong version for 3days i will waiting if see this problem again
so, there is not solution without being root? I don´t want to have to open the bootloader.
If there isn´t much people with the same problem i will think that it is problem of the terminal so i will use the warranty.
Regards
so i have this same problem, but only when plug headphones with usb c adapter, sometimes i cant ear and the person in other side cant ear me too...even if i unplug and plug in back again, it only work if i unplug, then i can ear and they can ear with loudspeaker.
but to make it work trough headphones i need to restart the phone when this happens.
probably this have to do with audio mod's i have installed like audio library and dolby, and sometimes get this problem, not always...but time to time.
- i know im not helping, just say what my problem is and maybe someone find a relation with yours problems.
sun_is_shinning said:
so i have this same problem, but only when plug headphones with usb c adapter, sometimes i cant ear and the person in other side cant ear me too...even if i unplug and plug in back again, it only work if i unplug, then i can ear and they can ear with loudspeaker.
but to make it work trough headphones i need to restart the phone when this happens.
probably this have to do with audio mod's i have installed like audio library and dolby, and sometimes get this problem, not always...but time to time.
- i know im not helping, just say what my problem is and maybe someone find a relation with yours problems.
Click to expand...
Click to collapse
To know that are more people with the same problem helps a lot.
If the problem is originated by a third app as you suggest the problem will appears other time even if the shop change my terminal.
I will try that you say of the headphone when the problem returns.
Thanks!
The audio of the alarm clock does not work either, vibrates but it does not sound

P30 Pro micro issue

Hello, my p30 Pro have a problem in micro only when I was in call, people Don t hear me, but when I test the mic in WhatsApp or in any application of audio recording is work fine, I Don t know if I have to change the mico or if any other way to resolve this.
test all microphones one looks defective
kozmikdeli said:
test all microphones one looks defective
Click to expand...
Click to collapse
how do we test the microphones? how do we know which app uses which microphone?
in my case, the mic starts working after 10-30 seconds in the call (sorter if I start the call, longer if I receive)
Whatsapp and audio recorder work fine but google assistant and shazam are deaf
I tried resetting the phone and starting in safe mode to no avail
test all microphones with my Huawei app. Some apps use one of the left or right microphones at the bottom. My mate 10 pro, the bottom one had the microphone on the left broken. That's how I know.
thank you, recording from the bottom mic does not work, still don't understand why it works in call after 10 seconds or so (switch to the top one?).
I have The same problem. And it started after update to emui 11. If its a hardware problem IT should happen Evan after IT stars working. Im trying to reflash my device but i had no luck. Erecovery stops AT 19% download. Fastboot HiSuite says device its not supported.
problem is 100% your bottom (main) mic. The top mic kicks in about 10 seconds into the call and that's how they will start hearing you. If you start the call in speaker I'm sure it works perfectly. I have changed this on my p30 using a part from [email protected], and can confirm it works.
I have the same problem with the microphone on my P30 Pro. Does that mean that all applications (camera, voice recorder, whatsApp, loudspeaker ...) use the upper microphone? The microphone below is for calls only? When I answer normally, the microphone turns on in 5 seconds. And when I answer the loudspeaker, the microphone works immediately. When I used apps to record conversations, nothing is heard. Neither I nor the caller. I tested everything through the My Huawei app, and it only reports an error for that main microphone. If I replace the main microphone, will the problem go away or is it a software error?
Having issues with the lower microphone that's been listed all over the net, ie delay in hearing me when answering calls and google assistant not hearing me.
Two lower sim/memory/microphone boards later still didn't fix it. For me swapping out the USB ribbon connector has cured it. Just in case this helps someone.
Try this:
P30 Pro Failed Lower Microphone Issue - Workaround possible?
I really like my P30 Pro but this last week callers have been complaining they can't hear me all of the call. It seems to be this happens for the first 10-15 seconds of the call and then sporadically throughout the call. I have searched the...
forum.xda-developers.com
In my case I replaced micro PCB only but does not work. Will try replacing USC charging (and more) flex and post the result on that post.

Peculiar proble no speaker sound + internal call feedback loop

So I have a Mi 8 and I apparently broke the screen just while in pocket, though the phone did not really hit anything. (warranty did not cover, they stated micro fracture in screen and user fault).
I changed succesfully the screen myself, but after screen replacement, the phone loudspeaker did not function, no music, no ringtone. Headphones work fine.
So i replaced the speaker unit, did not fix the problem.
Updated MIUI, no work.
Flashed Lineage OS succesfully (for my own fun), did not fix it.
After installing LíneageOS, I noticed when using phone call (gsm etc.), cannot call because the sound is messed up, sounds just like microhone feedback loop near speakers. I don't know did this happen after Lineage or not, as I did not try calling before. Whatsapp then again works just fine, so I suspect something messed up in phone internal call circuit or something (I'm not an expert).
Any ideas on fixability?

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