Call volume too low - Redmi K20 / Xiaomi Mi 9T Questions & Answers

Hello, since the last update of Xiaomi.EU MIUI 11 stable ROM with Android 10. Even with the maximum call volume, it sounds very low. Can anybody help me please? With previous versions it did not happen.
Does anyone know what value of the build.prop relative to the call volume was changed from the MIUI 11 version with Android 9 to the version with Android 10?
Thanks.

Nobody knows?

No solution yet
We need to send feedback to Xiaomi, use the app services & feedback and report ....
---------- Post added at 08:20 AM ---------- Previous post was at 08:15 AM ----------
https://xiaomi.eu/community/threads/miui-10-stable-weak-sound-during-calls-solved.46166/

Found one app
Maybe will help

I used to have this issue on my OnePlus 3T. It happened when the reciever mesh was blocked with dust so I'd just take a toothbrush and clean the mesh and that would fix it. Try that on your 9T once, whoe knows maybe it'll work

Mizart said:
I used to have this issue on my OnePlus 3T. It happened when the reciever mesh was blocked with dust so I'd just take a toothbrush and clean the mesh and that would fix it. Try that on your 9T once, whoe knows maybe it'll work
Click to expand...
Click to collapse
This is half a year old post but it turned up as I googled the issue. I too have suffered from low phone call volume and was looking for a mod or something to boost the volume. But as I read this reply from Mizart I actually remembered I had fixed the issue on my previous phone just by cleaning the speaker carefully. So I did and now the phone call volume almost hurt my ear.
So what I did was I took a brush with as many soft bristles as possible. I found an antiseptic alcohol solution which I sprayed a little to the speaker and brushed with some force in order to make sure the bristles went in. After some brushing I dried it and took it to my vacuum and vacuumed the speaker with full power.
This worked quite well and as I was on it I cleaned the other ports too
Hope this helps!

I had this issue for almost 4 months, changed 10 roms , then found it was my firmware issue. THEN SOLVED.

watteus said:
This is half a year old post but it turned up as I googled the issue. I too have suffered from low phone call volume and was looking for a mod or something to boost the volume. But as I read this reply from Mizart I actually remembered I had fixed the issue on my previous phone just by cleaning the speaker carefully. So I did and now the phone call volume almost hurt my ear.
So what I did was I took a brush with as many soft bristles as possible. I found an antiseptic alcohol solution which I sprayed a little to the speaker and brushed with some force in order to make sure the bristles went in. After some brushing I dried it and took it to my vacuum and vacuumed the speaker with full power.
This worked quite well and as I was on it I cleaned the other ports too
Hope this helps!
Click to expand...
Click to collapse
I have just did this and my volume during a phone call is better than I remember... It took maybe 15-20 careful swipes with extra soft teeth brush. Thanks!

watteus said:
This is half a year old post but it turned up as I googled the issue. I too have suffered from low phone call volume and was looking for a mod or something to boost the volume. But as I read this reply from Mizart I actually remembered I had fixed the issue on my previous phone just by cleaning the speaker carefully. So I did and now the phone call volume almost hurt my ear.
So what I did was I took a brush with as many soft bristles as possible. I found an antiseptic alcohol solution which I sprayed a little to the speaker and brushed with some force in order to make sure the bristles went in. After some brushing I dried it and took it to my vacuum and vacuumed the speaker with full power.
This worked quite well and as I was on it I cleaned the other ports too
Hope this helps!
Click to expand...
Click to collapse
Its ok to use toothbrush but vacum cleaner could damage your earpiece, you were lucky I guess .

It worked!!
Mizart said:
I used to have this issue on my OnePlus 3T. It happened when the reciever mesh was blocked with dust so I'd just take a toothbrush and clean the mesh and that would fix it. Try that on your 9T once, whoe knows maybe it'll work
Click to expand...
Click to collapse
Such a simple solution to such an annoying problem! :silly: Worked like a charm...

I tried combining both. What solved the problem first was cleaning with a toothbrush. Then, using the engineer mode I was able to perfectly control and configure the desired volume of the receiver. Thank you.

Related

Rear speaker - where can I get one

The rear speaker of my JAMin blew... I need a replacement so I can do the work myself and not have to send it over for a week to the lab. Where can I get one?
Thanks,
Nir
How to repair the sound issue on Prophet
Hi
I could read a lot of posts on that issue and found this solution:
Remove the battery cover. Then the camera cover: to do so, lift up the gently the cover starting from the side of the battery.
You will see something looking like a fan. This is the speaker. the problem is with the red wire whixh connect the speaker.
Turn on your prophet and run your favourite MP3 song.
then touch the red wire with your stylus. The sound should come back. Insert a piece of folded paper to keep the cable properly fixed. that's all
Watch out not to wish to fix it too nicely, you could damage the wire !
Hope this help, otherwise a return to the service department will be necessary !
Hope this helps
Regards
Régis
Hay the paper trick works!
I went here to learn how to remove the flap to the speakers:
http://www.modaco.com/index.php?showtopic=240109
Well, my speaker had the voice coil broken... touching the membrane would bring it back to life but that is no real solution. I replaced it with a speaker from a used old cellphone with some minor use of hot glue to fix it in place and seal around it.
It works now just as new.
Nir
yeah it is a real Problem.
mine is broken twice in 6 months.
tried the paper thing. but it sometimes sounds weird and there's some hissing. maybe I did it wrong. so I tweak it a bit and just lost it completely. no sound whatsoever now.
went to the service center today. they said that they have a new batch of speaker which supposed to be better than the previous one. if anyone can confirm.
rlou77 said:
Hi
I could read a lot of posts on that issue and found this solution:
Remove the battery cover. Then the camera cover: to do so, lift up the gently the cover starting from the side of the battery.
You will see something looking like a fan. This is the speaker. the problem is with the red wire whixh connect the speaker.
Turn on your prophet and run your favourite MP3 song.
then touch the red wire with your stylus. The sound should come back. Insert a piece of folded paper to keep the cable properly fixed. that's all
Watch out not to wish to fix it too nicely, you could damage the wire !
Hope this help, otherwise a return to the service department will be necessary !
Hope this helps
Regards
Régis
Click to expand...
Click to collapse
That's great, this fixed my problem. After I touch the red wire with my stylus, the speaker just works fine, don't even need a folder paper.
starrayfly said:
That's great, this fixed my problem. After I touch the red wire with my stylus, the speaker just works fine, don't even need a folder paper.
Click to expand...
Click to collapse
I'll try this one myself - my speaker just died again - it's been back once already.
Well, I followed the instructions above and now I have a working speaker again. A very low tech fix to a high tech device.
I have found a small bit of sponge does the job better than folded paper.
what is the type of speaker.
i mean can i use any speaker?
what's the best?
Mohammad, you seem to have missed the point of the replies in this thread. We don't know where to get another speaker from but we do know how to make the existing one work again.
oh, dude!!!
sorry
What a piece of ugly Speaker: O2 xda Neo!
Hay Guys,
I am suffering from this nasty problem since sometime. My brother has tweaked the speakers with a metal piece seem to work. However if I use speakerphone, it goes off.
Is there a permanent solution to this constant spurce of unhappiness.
Incidently I have been blessed with a on & off camera problem as well. I think I will never buy a DOPOD product in my life again.
My Camera has those colour matrix instead of proper images. Occasionally it behaves normally. I have tried hard reset already.
Any body? help !!!!!
Ugly Speakers: O2 xda Neo
Hay Guys,
I am suffering from this nasty problem since sometime. My brother has tweaked the speakers with a metal piece seem to work. However if I use speakerphone, it goes off.
Is there a permanent solution to this constant spurce of unhappiness.
Incidently I have been blessed with a on & off camera problem as well. I think I will never buy a DOPOD product in my life again.
My Camera has those colour matrix instead of proper images. Occasionally it behaves normally. I have tried hard reset already.
Any body? help !!!!!
I tried this....when i touched the red wire i got the sound back i was happy.. but not for long cause touching the wire now doesn't help anymore so i have to send it back
drdeepak said:
Hay Guys,
I am suffering from this nasty problem since sometime. My brother has tweaked the speakers with a metal piece seem to work. However if I use speakerphone, it goes off.
Is there a permanent solution to this constant spurce of unhappiness.
Incidently I have been blessed with a on & off camera problem as well. I think I will never buy a DOPOD product in my life again.
My Camera has those colour matrix instead of proper images. Occasionally it behaves normally. I have tried hard reset already.
Any body? help !!!!!
Click to expand...
Click to collapse
I wedged in a piece of foam. That's worked a treat.
The manufaturing quality of HTC is bad
I also have the speaker problem. And thanks for all of you to suggest that sponge and folder trick. I did it and i have put a small slice of ear plug sponge. For past 2 days my spearker is working. But dont know how long will this sponge give my speaker lifesupport. I am sure after few days again its going to be problem. Hey,...... is there anyone in this thread who has used sponge/paper and the speaker is working for long time.. at least a year ?.
These HTC products seem really bad quality products.
that worked
http://www.4shared.com/file/6894706/ca35cee6/altavoz_s200.html
motorola l7 speaker is too a candidate
It's too bad they saved on the speaker. Guess the manufacturer of the speaker had a very nice presentation @ HTC
Trying to download that pdf file, but it's not working :/ However I've read on other occasions that people talk about that motorola speaker as a replacement. Might be worth giving a more detailed look into that.
What exactly is the problem with the speaker btw? Did anyone narrowed that down already? Why is the speaker not functioning properly?
pdf
The file contains instructions to change the original speaker using the spk of a motorola v525.
I did it yesterday, and works fine, but isn´t easy to do it

Speaker Issue

Hi,
Has anyone encountered any issues with their speaker apart from that infamous volume balance?
My right speaker refuses to play anything but if I press the chassis of the transformer together the speaker works but stops working as soon as I let go. To me it sounds like some sort of loose connection/contact.
How easy is it to dismantle? Has anyone encountered a similar issue?
Thanks.
neoghio said:
How easy is it to dismantle? Has anyone encountered a similar issue?
Thanks.
Click to expand...
Click to collapse
My left speaker doesn't work, but very occasionally will momentarily come to life. Squeezing the edge doesn't make a difference. I assume its a loose connection, but I have'nt done anything about it yet.
My left speaker doesnt have any sound at all
Hey OP, I have the same issue, except mine still plays at times, gets fuzzy and buzzy at loud volumes, then stops. However, if I press the right side together, it plays again, so it's not noticeable if I use a really tight sleeve on it, but with the loose sleeve I normally use on it .. :/
Same here, when it does play, its very buzzy. I am inclined to open it up and check if its some loose contact or something but I don't fancy messing my Transformer up as of yet lol.
No problems with either of my Transformers myself, but there were a few reports in the past of poor connections to one of the speakers on some TF units. (Right speaker, if I remember correctly.) Forum search will find them.
If my TF had these issues I would send in for repair
Sent from my PC36100 using Tapatalk
http://forum.xda-developers.com/showthread.php?t=1118010&highlight=speaker
My left speaker quit working all together and right speaker from the start was extremely weak. I sent it to ASUS for repair with less than one week turn around and both speakers are nice now. Well worth the time to have done properly.
I'm scared of the RMA process tbh :/
I Managed to fix mine if you people are interested.
It involved disassembling the Transformer.
I took the speaker out of the "compartment" it was in, switched on the tablet and put on some music. No music came out. Pressing the speaker in sound came out but as soon as I let go the sound disappeared. I cut out a small piece of paper and folded it a couple of times and placed it in the compartment the speaker goes in.
When I put the speaker back in the paper sort of squashed the speaker in a bit which in turn kept playing music.
Its not the best of explanations but if someone has a similar issue they may be able to use that as a guideline lol
How hard is it to disassemble the tablet? Also, what tools would I need?
asdfuogh said:
How hard is it to disassemble the tablet? Also, what tools would I need?
Click to expand...
Click to collapse
Its not very hard. You just need some patience as removing the bezel is the only bit you need to be careful with.
You would need a Phillips screw driver (one of the small ones) and a Torx T5 I believe was the correct size.
I used this video as a guidance:
http://www.youtube.com/watch?v=JG9gEYRALtU
To remove the bezel he uses a plastic tool with a very thin edge but many people have had success simply using a guitar pick to remove the bezel. Luckily I had one of those plastic tools and was able to remove it.
Once you can see the insides:
That little black rectangle on the right is the speaker, inserting the small screwdriver in the compartment its in, you should be able to take it out and if your encountering the same problem as me, just press and hold the speaker from both sides to see if audio works.
Picture credit goes to hybridau
neoghio said:
Hi,
Has anyone encountered any issues with their speaker apart from that infamous volume balance?
My right speaker refuses to play anything but if I press the chassis of the transformer together the speaker works but stops working as soon as I let go. To me it sounds like some sort of loose connection/contact.
How easy is it to dismantle? Has anyone encountered a similar issue?
Thanks.
Click to expand...
Click to collapse
This happened to me tonight while watching a youtube vid! Been looking through the forums for successful speaker replacements and messaged one guy already who might have the correct replacement speaker part.
Will update when I know more.
Cracking it open is very easy as long as you take it slow. I did it to fix my power button. It is pretty well known by now that the TF101 was one of the most cheaply built but still amazingly performing tablets on the market.

S5 Duos low mic

Hey guys just got my S5 and I am told that the mic volume is quote low by people I speak to. Is this normal or I have a faulty device on my hands
Very unlikely to be a hardware problem. Usually it's a user error e.g. not holding the phone close enough to your mouth or using the phone in very loud environments.
Try using the phone normally i.e. not in speaker phone mode where performance is worse and you annoy everyone within earshot. You can also try disabling noise reduction in the settings menu. Infrequently you may have water, dirt or your finger (when you hold the phone) obscuring the microphone hole on the bottom of the phone.
It's also possible to tweak the mic volume in the service menu /audio submenu. A forum search will explain the details if you wish to try that.
.
fffft said:
Very unlikely to be a hardware problem. Usually it's a user error e.g. not holding the phone close enough to your mouth or using the phone in very loud environments.
Try using the phone normally i.e. not in speaker phone mode where performance is worse and you annoy everyone within earshot. You can also try disabling noise reduction in the settings menu. Infrequently you may have water, dirt or your finger (when you hold the phone) obscuring the microphone hole on the bottom of the phone.
It's also possible to tweak the mic volume in the service menu /audio submenu. A forum search will explain the details if you wish to try that.
.
Click to expand...
Click to collapse
HI, thanks for the info.. i have seen almost the same in the forum and outside like here http://droidtricks.blogspot.ae/2011/09/how-to-increase-or-boost-low-microphone.html
Is this still valid ?
Same issue with me
dusk1911 said:
Hey guys just got my S5 and I am told that the mic volume is quote low by people I speak to. Is this normal or I have a faulty device on my hands
Click to expand...
Click to collapse
I have the same problem on the same device - but from all the googling I did - It turns out it a common problem with the S5 (single or dual SIM).
So far I did not find any solution to the problem...
Please share if you had any luck?
I am even considering widening the hole of the microphone (it is about 30% narrower then the S4), I do not care that much of the water protection...
Solved!
Happy to report I solved my low mic. problem!
Unfortunately it compromises the waterproofing, but I gladly sacrificed it!
I did poke in the microphone hole with a tin wire about 3-4 mm into the hole. I did not feel any resistance, but apparently I broke the waterproofing membrane on the microphone hole.
Now people can hear me even when I am whispering! I am so happy with my phone! (at one point I was thinking of replacing it because of the muffled mic.!)
The membrane I am talking about can be seen on the middle frame over the mic. hole on the attached picture.
Please if you do what I did - be careful, it might damage the microphone...
armsel said:
Happy to report I solved my low mic. problem!
Unfortunately it compromises the waterproofing, but I gladly sacrificed it!
I did poke in the microphone hole with a tin wire about 3-4 mm into the hole. I did not feel any resistance, but apparently I broke the waterproofing membrane on the microphone hole.
Now people can hear me even when I am whispering! I am so happy with my phone! (at one point I was thinking of replacing it because of the muffled mic.!)
The membrane I am talking about can be seen on the middle frame over the mic. hole on the attached picture.
Please if you do what I did - be careful, it might damage the microphone...
Click to expand...
Click to collapse
Hi armsel,
Good Spot!!! thanks for sharing the trick. I am having the same problem with my and I wish to follow your procedure in my phone.
Please provide more information with detailed steps and screen shots because I'm little confused in figured out microphone hole why because found two holes in bottom and top of the phone. I knew its my own risk and don't consider about waterproof.
Thanks in advance...
Tvm G said:
Hi armsel,
Good Spot!!! thanks for sharing the trick. I am having the same problem with my and I wish to follow your procedure in my phone.
Please provide more information with detailed steps and screen shots because I'm little confused in figured out microphone hole why because found two holes in bottom and top of the phone. I knew its my own risk and don't consider about waterproof.
Thanks in advance...
Click to expand...
Click to collapse
Your primary microphone is the one on the bottom - next to the USB port (the top microphone is used for noise cancellation and you can leave as it is). You only need to poke the bottom one. Be gentle - if you feel resistance - don't push (I did not feel any resistance as far as I can remember). Test afterwords and see if there is an improvement - if not, try to penetrate little bit further (I believe I went something like 3, maybe even 5 mm in).
Best way to test - if you have another phone and call it on Viber (I did that with my wife galaxy S4 mini). And leave your next to a radio set with talk show on.
Good luck! :good:
Solved!!!
armsel said:
Your primary microphone is the one on the bottom - next to the USB port (the top microphone is used for noise cancellation and you can leave as it is). You only need to poke the bottom one. Be gentle - if you feel resistance - don't push (I did not feel any resistance as far as I can remember). Test afterwords and see if there is an improvement - if not, try to penetrate little bit further (I believe I went something like 3, maybe even 5 mm in).
Best way to test - if you have another phone and call it on Viber (I did that with my wife galaxy S4 mini). And leave your next to a radio set with talk show on.
Good luck! :good:
Click to expand...
Click to collapse
Hi armsel,
Problem is solved now !!! Microphone is working fine now my voice is audible.
Poked with small needle at least 3mm to 4mm and test my voice with voice call and some messenger apps works fine :good:
I am wondering how you got this trick bcos searched whole web but could not get a right solution.
Great help and Thanks Man...

Microphone Broken? D801

Hello,
I have an issue with my microphone where I need to yell into it for it to have any volume at all. This behavior appears in Google Now, during phone calls, and with the Screen Recorder app (affects everywhere).
Reading a kernel thread in Android Development, I saw tons of people talking about gain and settings for the microphone, so for 3 months I chalked it up to a kernel issue in the CM nightlies I was using. Yelling into my phone in public so people could hear me haha
Since the official T-Mobile Lollipop ota came out, I decided to flash the KDZ from LG. This of course wiped out everything, recovery, new bootloader, even a new battery charging screen when dead. Clearly completely refreshed.
The issue persists.
Does anyone know what this could be? I had a similar issue when I was still in warranty, so I had the microphone replaced. I'm not sure if it did anything, I made a few test calls when it came back from warranty and it seemed to work (obviously on KK stock software for warranty shipment)
Please let me know! I wish I had an intuition with the G2 like I have had for several devices in the past, but I don't.
Thanks,
jcarrz1
My speaker is quite awful too. very quiet. (alarms, music, etc)
Headphones fine, normal volume too. and clear sound
jcarrz1 said:
My speaker is quite awful too. very quiet. (alarms, music, etc)
Headphones fine, normal volume too. and clear sound
Click to expand...
Click to collapse
May be the holes for mic is blocked with dust particles.
Would consider what he's ^^^^ saying.
Maybe worth opening the phone and cleaning out your dust from the inside out.
Especially on the bottom left where the Mic is.
Once you have it open blast the ports and speaker holes with a good amount of compressed air.
See if that makes a difference
That was it! thanks guys.
I actually used a normal staple to clean out the holes, I didn't have air or a needle handy. but it worked perfectly (I removed the back cover so I could see when they were cleaned out (by shining a light) and so that i wouldn't poke anything inside).
It's amazing how a little gunk/lint in those holes made me completely inaudible.
Thanks again.
jcarrz1 said:
That was it! thanks guys.
I actually used a normal staple to clean out the holes, I didn't have air or a needle handy. but it worked perfectly (I removed the back cover so I could see when they were cleaned out (by shining a light) and so that i wouldn't poke anything inside).
It's amazing how a little gunk/lint in those holes made me completely inaudible.
Thanks again.
Click to expand...
Click to collapse
Anytime!
Glad it worked out & was an easy fix

ear piece problem - replaced it and still low volume

Hi,
Few weeks ago the sound became very low no matter what I did. I thought that the speakers (upper / lower) are faulty and replaced them with new from AliExpress (trusted seller with high rating). After the replacement, the sound is still low on max configuration.
What else can be the problem?
Thanks
Lior84 said:
Hi,
Few weeks ago the sound became very low no matter what I did. I thought that the speakers (upper / lower) are faulty and replaced them with new from AliExpress (trusted seller with high rating). After the replacement, the sound is still low on max configuration.
What else can be the problem?
Thanks
Click to expand...
Click to collapse
Hi.... I have the same problem.. Very low volume in earpiece
dfernandopm said:
Hi.... I have the same problem.. Very low volume in earpiece
Click to expand...
Click to collapse
Me to.
in my case, the solution was to take the phone apart and after removing the ear speaker I could properly clean the ear speaker grill.
There is a really fine metal mesh net inside with micro holes that is getting completely gunked up (and I keep my phone clean usually but after 4 years of use...)
In the beginning I could not even see trough it when a normal light came from the back.
Initially, placing the display with the grill over another phones flash light I could see it as yellow greenish shining through.
It took me an hour of cleaning. I used a peace of a toothbrush and contact cleaner. I had to brush it from both sides several times.
In between using compressed air and at the and I used alcohol. After the cleaning i could see normal light coming through.
and the result is unbelievable. I thought it must be 100% a hard or software problem. Even after seeing the gunk I could not believe it could have such an influence...
Same goes for the bottom grill. People always complained they could not hear me well during calls.
After cleaning (less extensive) of the bottom grill it got much better.
Check the position of the mic and give it a good clean.

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