yashsingh1/xdaforums huggingface dataset:
[Galaxy S II General] vitsa:
The problem really not of isolation of speaker. Also not in cleaning of housing. My phone is almost brand new and I always was using case that always cover speaker holes. There is no garbage for sure. I was trying to cover just speaker with paper than with rubber-not help at all even become worst. Then I pick up little bit microphones and saw that there is no rubber seal under it only on top of microphone but not under.that's why vibration from speaker via hull proceed to Mic.when I put slice of rubber under Mic the echo disappeared at all. Look my upper post.the speaker should be free from top to let air pressure go out when the speaker works.
[Galaxy S II General] manmad:
ohh, so instead of putting something ON the speaker, you put some rubber UNDER it?
[Galaxy S II General] me_ashman:
Same, didn't work for me either. Mind only echos with the case on.
[Galaxy S II General] sir crackers:
solved

My wifes SGS2 has had the annoying echo only when a cover is on.

I tried the business card over the back of the speaker. Did not work....

Then I studied the picture in the post again - toxicdust outlines in red in one picture the area to put the cardboard - then in the picture with the cardboard in place the cardboard extends further - so it covers the gold spring/contact to the right of the speaker (the picture just under step 7)

So I made my cardboard piece a little longer - approx 16mm so it covered the speaker and the gold contact. Now the echo problem is gone completely.

Good luck.
[Galaxy S II General] toxicdust:
Some people seem to get mixed results with this. Thank you for taking a little bit of initiative as this is only a guide to the problem. On mine it wasn't necessary to cover the gold contact on the right.

I just covered the Area in the 1st picture as labelled with "C" and mine is working correctly.

I think all in all we found a solution that works for most with some little variations to it and that's the important thing ... that we have found a solution for at least more than 5 people
[Galaxy S II General] ramito1991:
Absolutely clean. I've used a small sized paint brush.

I'll give it a try, might work.

---------- Post added at 03:46 PM ---------- Previous post was at 03:08 PM ----------

I've been trying and must say it's not working.

---------- Post added at 04:15 PM ---------- Previous post was at 03:46 PM ----------

Anyway, thank you for the guide. At least it worked for someone esle :D
[Galaxy S II General] manmad:
since i did this, i hear a a very very still zooming in my ear when i make a phonecall!

Its annoying when im alone, could this be because i didnt clean it out? I tryed reopening my case but noticed it broke a little bid at the headjack so i was to afraid to open it again.
[Galaxy S II General] arnico:
Hi,

This worked like a charm for me !

If you try this, be carefull with the headphone jack when unclipping the back cover !

Thanks
[Galaxy S II General] capitanjrfr:
Hi, only with card paper doesnt work for me i use some rubber and put in the same position as u show in your photos and a add 1 extra over the upper mic and finally works awsome
[Galaxy S II General] Dauntless:
Is it a problem if I didn't put them back the same way?

I currently don't have the echo problem, but I did have a problem with my bottom microphone (grey rubber was out of place) and I didn't put it back the same way.

Is that bad? Can I recognize the screws that have locktite and if so, where should they go?
[Galaxy S II General] ballmead:
The picture shows the cardboard covering one of the contacts.

What is this contact for? It looks like it connects to an antennae on the case?

How is the reception on the phone after you installed the cardboard?
[Galaxy S II General] vitsa:
I have made some guide. Please find attached.

The main what need to do-to properly isolate microphones (upper and also LOWER)
[Galaxy S II General] onlyeyes:
Perfect

Dear Toxicdust & Vitsa,

the problem solved with much appreciation to your efforts,

however i fix my Galaxy S2 , using a combination of both your methods,

first , i made exactly as toxic dust advised , but the echo was still there but 50% gone,

then i made Vitsa way, the echo completely gone, but teh speaker was tooo low i hardly hear the caller.

then i covered the speaker wit two pieces of business card , and teh ic isolated with the very thin piece of elastic foam. not its worked perfectly and callers say my sound is very clear and clean did u get a new phone..

i'm really happy after i was sooooo disappointed.

guys you made my day.
[Galaxy S II General] ballmead:
Ok so I have tried cardboard 12x5, then 16x5 to cover the contact, tried rubber under both of the mics, rubber next to the mic and audio jack and nothing works to eliminate the echo other than taking my cover off or disabling noise reduction.

I reckon I have had the cover off around 10 times already, I'm an expert disassembler now

I have ordered a mesh cover to see how that goes, otherwise I will use the phone naked from now on.

Thanks for the suggestions but nothing seems to work on my phone :(
[Galaxy S II General] toxicdust:
Sorry to hear that it don't work for you I know how annoying it could be hence the guide.

If you look at how rugged these SGS2's are in comparison to any other phone you really don't need a cover for the phone to protect it.

I have been using mine without a cover for a while now without having any issues.
[Galaxy S II General] ballmead:
No worries mate.

While it didn't work for me, it's good to see people like yourself take time out to help others with this annoying issue.
[Galaxy S II General] snigade:
Solution didnt work on my SGS2

Guys,

I tried to follow the same method given by vista and toxicdust, however the echo is reduced by 70%, but hear it a bit in background... any suggestions please..
[Galaxy S II General] manmad:
Try using thicker paper or a larger one
[Galaxy S II General] snigade:
I used rubber to cover back side of speaker and as isolation between mic and speaker. First time the echo was completely gone however the voice was very low other side. so removed the rubber from back of speaker and replaced with thick paper, This time voice problem was resolved but got small amount of echo...
[Galaxy S II General] toxicdust:
Check if the rubber around the noise sensor is properly on the sensor.

The problem is definitely on the noise sensor and the speaker that you just need to isolate from one another

Its been a week now with a lot of calls and every person I talk to I ask if there are any form of echo and not one person has picked up any form of echo.

So this is definitely a permanent fix for the problem. If its not working you probably did something wrong. Follow the instructions carefully and clean it properly before putting pressure on the speaker.
[Galaxy S II General] xxxstar123:
Thank you, for the guide anyway I had this problem and I return the phone back to samsong and waiting for my replacement and I will see if i still have this issue,one question what kind of screw you used to open the phone??

but this problem has been solved with i9100g i had I9100G but I replace it with I9100, because there isn't many developers going through it and not many roms nor kernels, and i faced the sound + the mic issue.
[Galaxy S II General] snigade:
Hi Toxicdust,

Thanks for your reply. Can you share your number with me as i stay in Randburg. May be i can discuss with you on fix.
[Galaxy S II General] ballmead:
I bought this Mesh case from Ebay and it has cured my echo problems. No need to go naked any longer :)

It fits really well too and is quite grippy.
[Galaxy S II General] toxicdust:
snigade just phoned me

He can confirm that there is absolutely no echo on my phone now :)
[Galaxy S II General] MrOBM:
Genius! Can't believe that worked. Should be made a sticky!!
[Galaxy S II General] Midnight Marauder:
thanks for sharing this! i'm going to try it when i have less homework, really hoping it fixes this annoying echo...
[Galaxy S II General] jr866gooner:
Didnt fix for me :-( still get the echo with casemate tough.
[Galaxy S II General] manmad:
I got same case and works perfectly. You might have done something wrong
[Galaxy S II General] jr866gooner:
Hmm did you use just one piece of card or double up two? Also did you have it covering only that square? Maybe my card needed to be bigger covering a greater area...

sent from t'internet
[Galaxy S II General] manmad:
One piece covering the whole nick. Not sure if it's same size or not. Maybe it moved while you closed your phone?
[Galaxy S II General] toxicdust:
Ye I think that's what's happening in most cases. When they close the phone the cardboard moves and it don't help then.

The other thing is that people use paper that's 0.1 mm thick and wonder why its not working.

Folding paper 2 to 3 times wont help. You need a solid 0.5mm to 1mm thick piece of solid hard paper.

Thanks for everyone who have commented on this section to acknowledge that this works. I appreciate it :)
[Galaxy S II General] oeggo:
I will definitely try this today and see what happens, I only get echo with my case on. Let me tell you i have used a workaround that i found on the internet, you only cover the mic hole next to the earphone jack with tape a it will stop the echo, but you will have to be always checking that the tape is covering perfectly the hole, and even like that some times you get randoms echo, but just only for short seconds.

I will try today your method because i really want a permanet solution. Will post back after I try
[Galaxy S II General] vitsa:
I have made some useful picture pls check it - hopefully this will help to stop echo...

By the way some guys going to use balloons. Balloons made from LATEX!!! Do not use it! Latex can be destroyed during year or two.

Also do not use latex gloves & other latex products :)

Better slice by sharp blade thin piece from some rubber washer or other "LONG LIFE" rubber.

Only rubber (or paper) over speaker does not help on most cases.

Also pay attention that original rubber that covers the microphones (upper & lower) it should be fit tight!!! (I describe it on my picture)
[Galaxy S II General] i1allz:
Yes, echo is gone by using 3 rubber pieces, using just 1 piece over speaker is not working, thank you all !!! ;)
[Galaxy S II General] vitsa:
It is really pleasure to heart that my method become useful for somebody thankfully to toxicdust.
[Galaxy S II General] oeggo:
I tried yesterday all the methods described on this thread, and to my frustration the echo refused to go away, when i was ready to give up and after three failed attempts, i opened my phone one last time to take out every piece of rubber.... and then I noticed something was wrong with the original rubber that covers the noise reduction microphone, it did not fit tight, i checked it and notice the opening that cover the noise reduction microphone was not big enough for the actual microphone to fit in completely, so I opened it just enough for it to fit tight, I took all my rubbers out and to my joy it did work. I have been testing the phone the hole day and have had no eco at all. So for those of you that the previous methods haven't worked try this , maybe you are lucky as was I :D

Good luck to everybody.
[Galaxy S II General] toxicdust:
Thank you for the explanation. I did however mention it in step 4 to make sure the sensor is correctly entered into the sleeve.

The instructions on the 1s post should be followed carefully as the combined effort of all the instructions fix the problem.
[Galaxy S II General] vitsa:
So I want to make some summary. If you have echo:

INSTRUCTION

0. Try to update yr phone to ANDROID 4 & check if echo is gone, if its not help go to step 1. (added on 03 May 2012)

1. Prepare tools as on picture attached.

1. Open yr phone (by screwdriver & piece of sharped plastic card)

2. Check if original rubber casing that covers the BOTH microphones is fit tight. To be SURE remove the covering over NC Microphone sensor (upper mic (part A) on picture below) completely, put it back ensuring that mic is completely inside the rubber casing, then press it firmly in housing. Take a great care with sensitive parts!

2a. On the lower side of phone there is another mic, it has same rubber covering like Part A but gray color - make the same remove rubber casing completely, put it back ensuring that mic is completely inside the rubber casing, then press it firmly in housing(check very attentively, use light, magnifier & tweezers if you need).

Close the phone.

3. Check if echo is gone. If No proceed to (4).

4. Open yr phone again & put piece of business card over speaker (as described on picture below.

As per toxicdust instruction http://xdaforums.com/showpost.php?p=21314046&postcount=1

(but do not cover golden contact from right side of the speaker!!!)

Close the phone.

5. Check if echo is gone. If No proceed to (6).

6. Open the phone & put pieces of rubber as was described on the picture below. DO NOT USE LATEX AS IT CAN BE DESTROYED DURING SHORT TIME - USE LONG LIFE RUBBER!

Close the phone.

7. Check if echo is gone. If No repeat all steps again (more attentively because U are the professional already :) ).

For more detail information look upper posts of snigade , Toxicdust & Vitsa.

Do not forget to press thanks button & pls make some remarks in this topic about yr results, it will help other users.
[Galaxy S II General] jr866gooner:
Well had another crack at this,different,but larger piece of card. Removed both rubber housings that are attached to the rear case and re seated. After putting it back together i called my parents. Spoke to my mum first flicked between the two noise reduction settings my mum said she heard the echo... I thought balls! Back to square 1, next spoke to my dad and took a chance, tried both settings again only this time he said no echo was appearing. Bear in mind im still on the same call- now im thinking brilliant! But would there be a delay?! Well im going to be speaking with my wife later and will test it then. Fingers crossed it has gone. I will post my results!

sent from t'internet
[Galaxy S II General] coldasicet:
make video?
[Galaxy S II General] toxicdust:
If you cant follow 8 steps with clear marked pictures you wont be able to follow a video.

I haven't had any reason to open my phone again but if I do have to I will make a video next time :)
[Galaxy S II General] jr866gooner:
Called my wife, Echo appeared straight away for her So frustrating! Immediatly opened up the phone once more, Removed both rubber mic housings completely, Rather than letting them stick to the rear section I put the rubber housings in place before re clipping the case together. Opted to cut a second piece of card but this time slightly wider to cover more of an area and put this on top of my other piece of card this will then cause more pressure pushing the speaker down I guess but I shall make a couple of test calls tomorrow.

I was a little bit gutted because I had a glimmer of hope briefly with my earlier call to my folks then to be told on a second call, "your phones doing that stupid echo thing again!" Oh well lets see.

I cant seem to get the courage to remove the earphone speaker completely (Pic C) when I put pressure on it, it doesn't move. I get the feeling it will break if I tried to prise that away!
[Galaxy S II General] mariosraptor:
@OP the only bad thing you have made was to leave your imei uncovered. Please edit the picture so nobody steals it from there. Cheers
[Galaxy S II General] Dany716:
It Finally Worked!!

Huge thanks to toxicdust, vitsa and dutchiek! Combining a bit yours solutions i finally repaired this annoying echo bug and I couldn't be happier :)

I'm here trying to help others with my experience: i opened the samsung 6 times trying everything above without any result. First of all i want to recommend to pay attention with the screwdriver because if handled bad will ruin both itself and the screw : only use one of the right size and pull down costantly with your hand while using it, don't let it "escape" from the hole and scratch too much the screw. Then pay attention to the volume and power rockers that will fall from the case, they are pretty small. Be also very careful with the jack area that it's more fragile than the rest of the case. If you open that with hurry or put a too big piece of business card on the speaker , it will crack (and i'm speaking from experience).Basically what i did it's cover everything as said vitsa with solid rubber and put a piece of business card of about 0,7 mm x 5 mm x 16 mm (it covered the gold spring at the right of the speaker too). You have to be very careful with the dimension of the card : if it's too small it wont press it enough, if it's too big it will block the case and don't allow it to perfectly close itself.I used a file to scratch it of the right thickness. It's important to assure that it's stable over the speaker,if it's of the right size it will just remain in that position when you'll close the case (of course be carefull to don't accidentally move the paper in the operation!). So if you failed the reparation probably you choosed a bad piece of card and it doesn't block completely the echo. Hope this helped, Good Luck!!
[Galaxy S II General] GoldGanja:
Hello,

really really thank you for this guide toxicdust!

I followed it and now echo is gone...but instead of plastic card i used a sponge.

Thanks again...
[Galaxy S II General] toxicdust:
:)

That's not my IMEI. I got the pics of the internet because my phone was already closed up when I realized it was a solution and I made the guide.

But thanks for the concern
[Galaxy S II General] kotaxor:
Open up my phone today...(must say, it take some guts, as I'm not good at repairing).

As per your instruction, done and 'sow' it up.

Called a friend who always mentioned my phone echo is very bad....:D

Well....his reply is "NO ECHO".

Thanks for this!!
[Galaxy S II General] Qaseeh:
I salute you ! :)
[Galaxy S II General] felix_e1:
I have my SGSII since the beginning of December and it worked very fine so far.

Since yesterday, people complain that they can't hear me very well. Nevertheless nobody experienced an echo so far. I remember that my phone fell of the table yesterday before I called these people.

The question is now, is it possible that due to a problem with the 2nd microphone and therefore the noice cancellation, the volume of the microphone is tuned by down by the system? In this case a quick fix would be to turn off noise cancellation, but that can't be the final answer to the problem right? Is it even possible to that with Cyanogenmod 7? I haven't found anything so far.

I don't have any, and I mean any, tools here, so I probably need to bring it to the vodafone shop where I bought it. Unfortunately I have Cyanogenmod installed. There shouldn't be a problem in reapplying the stock firmware and in case it's need to be handed it to Samsung right? (I won't mention that the mobile fell of the table ;) )
[Galaxy S II General] Bughlol:
A simple way to fix it, without opening the phone !

I just fixed it by turning off noise reduction. The way I did it, get someone to call you then press the options button on the left near the the middle button, then you will see the option on screen's right lower corner (turn noise reduction on/off), just turn it off and there you go! Hopefully it will work for you and others also....:)
[Galaxy S II General] vitsa:
felix_e1, best way if you still have warranty - it is to flash normal original firmware and make custom binary count reset by jig (301k) (instruction here and here).

When you will flash original firmware - u can bring to service with no problem.

Other way - it is to open yr phone and to put back into the housings the mics what probably get out from proper position due to falling

Bughlol, that what I was doing during three months after buying my phone - disabling the NR from menu during calling (only), there was NO permanent option, I even decided to sell it but found this topic.

Here peoples decided how to disable the echo forever without fuc..ing manipulations with different firmwares & menu options.

If u want to make disabling every time when some one calling - it is yr right and this topic not for you. But if you dont like to do it every time - it is time to fix it forever by following instructions from this topic and posting results here afterwards. Good luck.
[Galaxy S II General] felix_e1:
Thank you so far. I'll scream into my phone for about 2 Weeks until I'm home in Germany so I can build that thing to send it to Samsung. Actually it's not that bad right know. I just have to speak a little bit louder and more clear.
[Galaxy S II General] vitsa:
felix_e1. JUST TEMPORARY u can use option described by Bughlol, but it is not decision, but this option dont work on some firmwares.

Some additional information u can find here
[Galaxy S II General] Bughlol:
Its not temporary, once you disable it, it remains disabled until you restore it manually. You don't have to do it every time you make or receive a call. I'm using Criskelo rom V38 (gingerbread 2.3.6)
[Galaxy S II General] jr866gooner:
But you say it is permanent,does this include stock?

sent from t'internet
[Galaxy S II General] vitsa:
Bughlol, futures of different roms discussing in other topics. I will not buy set of tools if I need just a screwdriver...
[Galaxy S II General] E:V:A:
GREAT JOB!

Sorry I didn't see it until now. I just linked up my original post to this page! So now everyone should find it easily!

ALL: If someone still have problems after this mod, please let us know.
[Galaxy S II General] stocovick:
I want to try it but my screw driver is not small enough! Is there a size number for the screw driver? Mine say's size 0! Is there anything smaller??
[Galaxy S II General] jr866gooner:
I used some precision screwdrivers, i only had a flat headed one that fits! Still did the job tho!

sent from t'internet
[Galaxy S II General] vitsa:
Dear E:V:A, It is really good job you made. It was really useful links, but it not actual already.

SOLUTION FOUND. Last 8 pages described completely how to let the echo go away for ever.

Almost all other solutions based on disabling NR function by software (diff roms) or by closing NR microphone.

Why I need disable NR if I paid for this?

It is really useful function, when I am calling from some noisy place to my friends they are always asking me: "..where you are why we nothing heart except your voice...?" they dont believe me that I am calling from city transport for example.

Installing some patches does not really help, because after updating software you need to search another one. Why I should use some ROM just because it has NR off if I dont like it? If I like to put new android 4, what I will search first solution how to cancel echo first?

Repeat ones again, LAST 8 pages HAVE REAL SOLUTION HOW TO REPAIR NR FUNCTION (NOT DISABLING AT ALL BUT REPAIR!!!).

For those who do not have screwdrivers. It is really easy to go to the nearest tools shop & find the cheapest Chinese screwdriver for less than 1 dollar BUT proper size!

All tools what u need described on picture attached.
[Galaxy S II General] toxicdust:
Hey

To some extent I have to say thanks to you E:V:A as you were the closest to a solution I got before opening my phone and just finding the problem.

I have made a call just now to yet again confirm that there is no Echo on my phone any more. It has now officially been 2 and a half weeks since I fixed my phone and the problem have not once reoccurred.

I have received 23 thanks since I made this topic and not everyone this worked for has clicked the thanks button. So there is definitely a solution in this thread.

More and more people are confirming that this solution has worked for them and thanks to all the others who have contributed small tweaks to refine it and make the solution solid.
[Galaxy S II General] Kpyto:
I'm f...k o..f the Samsung Galaxy official warranty (buy it mouth ago) and try this method.

Thanks God, it is completly working! Echo on my Galaxy SII is gone away!

NR is working! Rainbow in the sky! Ponies at the rainbow!

Thanks a lot. This is 10 minuts (with a cup of tea) work and 100% best result.
[Galaxy S II General] vitsa:
Tell us, what you so exactly?