yashsingh1/xdaforums huggingface dataset:
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
The only thing, that works 100% for me at this moment, is turning on the speaker and switching it off straight after... everyone who were ever complaining about it, said that after its like they stand straight next to me...

Originally, I though that all phones got affected, which would most probably be SW fault then, but since only few of us have it, then I am afraid, there's gonna be more than meets the eye...:D

Well, if you have this issue, so far, the best choice is get replacement and a new phone
[Galaxy S II Q&A, Help & Troubleshooting] muuu:
Well now I tried to do hard reset... And for now I've been echo free for about a day. :)

So now comes the "debugging" to find the root of the problem... :mad:

Retracing my steeps and calling my friends(At least for now) to see if they get echo's.
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
Just done the same!! Will post my findings over next couple of days..
[Galaxy S II Q&A, Help & Troubleshooting] Pacifiste95:
Same issue here
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
I am praying the KF3 update solves the problem... You will be the first to know if it does!

If any1 else notices a difference please say!
[Galaxy S II Q&A, Help & Troubleshooting] muuu:
From my tests it seems that when a programs asks for root(I have only tried granting requests) I get echos until I reboot.

In my tests I've removed all apps from super user before I reboot(Dunno if needed).

I tried ROM Manager, Titanium backup and SetCPU.

And after any of them asked for root the echos started.

What I did untill now:

Was running a stock XWKE1 rom and kernel. Only added root.

I did a flashed to get back to a unrooted stock XWKE1.

Did a hard reset. (Fixed the echo)

I rooted again. (Still no echo)

Then I ran SetCPU(Plus the others, one at a time) and it asked for root. (Now the echos are back)

I removed all apps from superusers list and rebooted. (Now the echos are gone again.)

My software:

Stock XWKE1 rom and kernel

Super user v2.3.6.1 (Info from Super user)

Su binary v2.3.1-ef (Info from Super user)

SuperOneClick v1.9.5 ShortFuse
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
didnt work for me:( I removed ROOT and did hard reset and still had echo.. some ppl said they can hear it, some of them said they cannot
[Galaxy S II Q&A, Help & Troubleshooting] muuu:
I also tried to remove root before I reflashed the rom.

I think(Not sure) that something in the rom might be broken. Try to flash a official rom then do a hardreset. And don't root.

After more testing I can hear echos every time i start super user.

Even when I start super user from the app launcher.
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
I have found mainly mobiles get it...landlines dont seem to get affected..
[Galaxy S II Q&A, Help & Troubleshooting] muuu:
I've just installed a new ROM: Cognition S2 (The only custom ROM I've tried yet)

And wiped from Clockworkmod before I installed it.

And it seems that I can run superuser on this ROM without getting a echo...
[Galaxy S II Q&A, Help & Troubleshooting] aprameya2k:
I do not have this issue with my handset..with and without cover..
[Galaxy S II Q&A, Help & Troubleshooting] kashtwa:
I am having the same issues.

I ordered a Silicone case which really is awesome and i love it.. prefer it much more than without but then today i was speaking to a relative and he said it was echoing.. i rebooted my phone.. same thing.. thought maybe it was his phone.. obviously it wasnt.. then i removed the case and the echoing disappeared.. It doesnt cover any holes and i wonder how it could echo though.. the speaker sound must travel via the silicone? i don't get it...
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
Ok, so just in case you would be wondering whats going on, I didnt get replacement of my phone as of yet, they failed to deliver, so I am still with my old phone, however I dont have ECHO any more... I have run the XWKF4 Kernel + I9100NEKF2 baseband version(official using KIES) and the issue is gone... no more annoying echo...
[Galaxy S II Q&A, Help & Troubleshooting] newtonfern218:
Thats great news @Zheiko.

Would I be able to use the same kernel and baseband version for my phone in India?. Also where can I get both these files from. Since I dont see them in KIES.?
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
That's great news! I wonder if Samsung are aware of the problem? How would we DL and install this firmware? Without root preferably!
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
No idea lads, I just had this update in KIES, I am in Ireland with Irish Carrier(doesnt make any difference) so I think its up to Samsung, when its going to get released in other countries as well...

You can always choose the option of installing unofficial kernel+baseband, but you loose warranty, and if in your case that would be HW fault, then it would be bad... so I'd suggest to wait for official release and be patient... I was pretty sure its SW fault from beginning, since turning on and off again loudspeaker worked charmingly, it could not have been HW fault...
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
So is KF2 newer than the most recent KF3 I have instaled?
[Galaxy S II Q&A, Help & Troubleshooting] superskip:
Samsung Galaxy S 2 Echo Problems

Hey all,

I am not sure if this acutally works but i found a youtube video of someone fixing the problem!!!!

If you type samsung echo problem on youtube or google
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
Not sure, unfortunately I dont have that deep knowledge of those, but as far as I know, KD5(thats the one I got this phone with) had echo, KF2 doesnt have it, Kernel did not have any impact on it, as when I was rooting, I have had KF4 installed already
[Galaxy S II Q&A, Help & Troubleshooting] amitambika:
i have this exact problem. first i couldnt beleive this and thought other phone calling me had this problem. this is very unfortunate.has it been confirmed that is hardware or software problem
[Galaxy S II Q&A, Help & Troubleshooting] galaxy_s2:
Will this be fixed with a new firmware version?? I have KE7 now.

Have tried many different cases. Contacted Samsung, they said to send it to repair. So I sent it, and after one week I get it back with the response that nothing has been performed since I sent the phone with a third party case, and that the phone works fine without the case.

This is getting very frustrating at this point.
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
If the case is the issue, then I dont think any firmware update will ever resolve it. My issue was different, my phone had this issue even without any case... and my issue got resolved by KF4 firmware and KF2 baseband...
[Galaxy S II Q&A, Help & Troubleshooting] galaxy_s2:
It is not this specific case that is the issue, it is 4-5 different types of cases that I have tested. To me it seems it is more likely that it is an issue with the phone.
[Galaxy S II Q&A, Help & Troubleshooting] roosta:
I always thought the echo issue was related to the network or connection your phone has to the network. Try changing it from 3G to GSM and see if the problem persists for those who arent using phone cases.

For those who ARE, try using the phone without the case for a few days; play around with it; data connection on, make a call, receive a call, data connection off (try with the USB debugging on/off as well). I'd be interested to know how this goes over a few days with some of you experiencing the problem. My SGS2 will be here in about 2 weeks; its an overseas import; here's hoping these issues are with a majority or batch produced!

RoOSTA
[Galaxy S II Q&A, Help & Troubleshooting] hq83:
I am also having this echo problem.

some people complain they hear echo or I sound very unclear.

during the same call when the person complain about echo/unclear, i plug in the earpiece and speak to them using the earpiece and the echo will be gone. if i unplug and use back the phone mic, the echo happens again.

Is this a mic problem?
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
Well, can be, try to put phone on Speaker and back, that was helping me, also, what Baseband and Kernel you have?
[Galaxy S II Q&A, Help & Troubleshooting] rwonderz:
litening 2.2 echo :'(
[Galaxy S II Q&A, Help & Troubleshooting] hq83:
say that post and tried but does not work for me.

send the phone down to service centre and they said that they replaced the lcd.

now its sound normally.
[Galaxy S II Q&A, Help & Troubleshooting] Zheiko:
Replaced LCD? What the hell? That most probably means that one of the mics are on same PCB as the LCD
[Galaxy S II Q&A, Help & Troubleshooting] angisbregolius:
Any news about this bad echo problem? someone has solved it?
[Galaxy S II Q&A, Help & Troubleshooting] amitambika:
Hi were you able to solve this problem.Which city in India are you in and did the service centre help at all ?
[Galaxy S II Q&A, Help & Troubleshooting] adidaddy123:
guys...i had the same problem with my s2....whenever i put my case on..all the callers would complain of voice echo....i spoke to samsung service center guys....at first they were confused but then they figured the problem out. Actually their is a cushion on back of the speaker of the mobile....which is not properly placed.....if not placed properly....when u put the case on ..it presses the cushion close to the speaker...which leads to the echo.....the service center guy fixed it in 10 mins.....So i would recommend u to go a service center guy and tell him the problem and he will fix it....its been over 2 days my fone is fixed and is working like a charm....Hope this helps..:)

and yaa...(to guys having problem in india)

i am from india ,delhi...i showed my fone in lajpat nagar samsung service center.....and its working fine now.
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
Would this be easily fixable by us? I havent heard any complaints recently about the echo...
[Galaxy S II Q&A, Help & Troubleshooting] adidaddy123:
i dont think soo....the cushion is at the back of the main camera.....hence u would have to open up your mobile....remove the back camera!!!....which i would not recommend..
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
I got my phone from carphone w/house on orange.

I sent a complaint email directly to orange venting my disgust.

They tried to call today in response to this but left a message. Theres a chance when tech support call back tomorrow they may arrange for me to swap the handset for a new 1! I told the guy (@orange) I had already done a factory reset and fw upgrade and he said theres not much more I can do, tbh I havent had complaint of this from people I either call or call me recently, I shall post back the outcome regardless from orange!
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
Same problem here :(

To solve the problem I have to disable noise reduction.

I wouldn't sent it to Sam. center now, how could I disable noise reduction as def. option?
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
Not a permanant way to switch off unfortunatly but im keeping fingers crossed for a swap..
[Galaxy S II Q&A, Help & Troubleshooting] dzontra11:
Same problem was here on Serbia..no case..just naked phone and damn echooooooo....now ..echo gone after update last firmware.

I dont know..buy seems like a rom bug...
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
What's your firmware?

I have problem with *KF3 ROM and *KF3 with Ninphetamine v2.0.2 kernel :(

I did some tests:

SGS2 + TPU case + N.R.: BIG echo problem

SGS2 naked + N.R.: echo problem

SGS2 without it's back cover + N.R.: small echo problem

SGS2 + TPU case -N.R.: no problem

SGS2 naked -N.R.: no prob.

SGS2 without it's back cover + N.R.: no prob.
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
The last one is

SGS2 without it's back cover -N.R.: no prob.

I cannot edit my posts :(
[Galaxy S II Q&A, Help & Troubleshooting] dzontra11:
2.3.4.

xxxkg2

kernel

2.6.35.7-00xxxkg2-cl375027se.infra@sei-21#2

..and i try again to call my friend and no echo at all...
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
Ok, thank's. I'll try to flash the DarkyROM KG6 Base. Let's see if I solve the problem :/
[Galaxy S II Q&A, Help & Troubleshooting] newtonfern218:
The problem still exists. Im in Bangalore and tried contacting the service center, but did not want them to open the phone, so havent sent it in for service.
[Galaxy S II Q&A, Help & Troubleshooting] dzontra11:
..and turn off noise reduction just once and echo should gone.
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
Nothing to do: if I don't disable NR, echo is still here :(

I'll send it to a Sam. center on Semptember :/
[Galaxy S II Q&A, Help & Troubleshooting] dzontra11:
.like i said..you need to switch off NR just once...no need for second time..and try to put same kernel loke mine...
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
I did 2 calls, nothing to do: I have to disable NR in each call. :/
[Galaxy S II Q&A, Help & Troubleshooting] omar.abbas:
sorry for this noob question but whats an N.R? :confused:
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
NR stays for Noise Reduction, that is active by default; there's also a small icon near "Pause button" when you are in conversation that indicate you that NR is active. You can disable N.R. during a conversation pushing the appropriate button in conversation menu :)

I contacted samsung call center: I have to send it to a Sam. assistance center :(
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
I got a result,orange have agreed to send me a phone albeit orange branded. Lets see if that helps!
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
They lied! I factory reset my phone for nothing ANGER! Only hope now is new fw will fix..
[Galaxy S II Q&A, Help & Troubleshooting] Stabba:
I also had this problem and have since flashed back to firmware I9100XWKE7 and from all the tests I have done so far all echo has disappeared.

The echo used to be heard with a case on the phone and it didn't matter if it was a hard plastic case, a rubber case or even a tpu case. It was sometimes even heard without a case although I'm not 100% sure if that is totally true or not but as soon as I switched NR on it obviously would kill off the echo.

If I use any recent custom firmware based on 2.3.4 or standard of the same build the echo is present.

I haven't tried any other 2.3.3 firmware since the problem seems to be gone, so I thought I would post my results.

Yes my phone is rooted and usb debugging is enabled also.

Hope this might help someone else.
[Galaxy S II Q&A, Help & Troubleshooting] MS.:
Get out of bathroom :D
[Galaxy S II Q&A, Help & Troubleshooting] gervasius:
Echo is always when I have silicone case on my phone.

When I remove silicone case, other party doesn't hear echo.
[Galaxy S II Q&A, Help & Troubleshooting] hyperbolic:
My gf and I both has SGS2 and we both are suffering from this problem, I am on a network that support only WCDMA and she is on a different carrier that support 3g/2g.

Mine is rooted and hers not, we tried everything, removing the case (which is idiotic imo), rebooting the phone when it happens but the only thing that works is disabling NR...

I won't return the phone because most of the time I talk on speaker (which is great!) and via bluetooth at my car.

But my gf is getting frustrated really fast...I hope she won't return her phone.

I need you all to understand, THIS IS

NOT

A SOFTWARE ISSUE, it is a HARDWARE ISSUE, because when you disable NR everything works great.

On most of the phones (Not SGS2) they have NR too, but manufacturer disabled them before they left the factory, I read it on at least 4 phones a few months and years ago.

Solution is easy, flash to a rom when the NR is disabled by default.
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
Could you write here where are the SGS2 roms with NR disabled? :)
[Galaxy S II Q&A, Help & Troubleshooting] hyperbolic:
I wish I could but I have no idea, I would love to see a mod, so we could flash it and it will disable NR as default.
[Galaxy S II Q&A, Help & Troubleshooting] roozin:
Ok....so can we bgin to nail this issue as it is driving me crazy?

In summary I have the echo when phone is in any of 3 cases I have tried: Official Samsung meshed, Casemate Tough and a silicone skin.

The problem disappears if:

a) When wearing a case I turn off noise reduction during a call

b) When wearing a case I turn on speaker during a call

c) I take the case off.

Is this a hardware issue as some posters suggest and due to case and phone somehow interacting?

Is this a software issue?

Is there likely to be a fix coming?

Do I need to send phone back for repair?

Is there a simple workaround other than those above to allow me to use a case whilst maybe disabling noise reduction by default rather than call by call?

Thank you for all the advice...
[Galaxy S II Q&A, Help & Troubleshooting] WarSide:
Yes, 1st one. Yes. Yes, but you cannot disable by def. N.R., you have to disable it everytime you do or receive a call :(
[Galaxy S II Q&A, Help & Troubleshooting] amdaley:
I've only had this echo problem once when on a call & I was sitting next to my PC. I stepped away from the PC & the echo stopped.Sounds like a shielding problem to me where one electronic component is affecting another.
[Galaxy S II Q&A, Help & Troubleshooting] cantelog:
I just got my screen replaced and i have the bad echo problem here too!

im running Cognition v1.5

but will revert to a stock rom to see if its hardware
[Galaxy S II Q&A, Help & Troubleshooting] cantelog:
Ive reverted to a stock rom, and still have the echo issue..

im taking my phone back to ask questions about the lcd change
[Galaxy S II Q&A, Help & Troubleshooting] mostyle:
I have the official SGS 2 case (ordered from Korea via ebay) and have never had echos..
[Galaxy S II Q&A, Help & Troubleshooting] C J:
bought original samsung leather case at $49. Echo.

Original Rom KE1. Echo.

Flashed Litening Rom. Echo.

Flash Darky's Rom. Echo.

Flash bck to original rom then upgrade to XXKH3. Echo.

Flash to Sensation Rom. Echo.

Removed Leather case. No more echo.

using S2 now, naked.

tried after a few days to use it with the leather case and echo comes back.
[Galaxy S II Q&A, Help & Troubleshooting] EarlZ:
This is quite odd, a friend of mine returned his phone because it echoed like crazy in calls they tried 2 other phones in the retail store and both didnt have a single echo.. so this is some noise cancellation + HW issue combined.
[Galaxy S II Q&A, Help & Troubleshooting] angisbregolius:
I send my s2 with echo issue to samsung 30/august/2011...i hope he test it with a case cover...i'll post here news.
[Galaxy S II Q&A, Help & Troubleshooting] JezzeB:
Echo problem solved (I Hope)

Hi yall i just bought the s2 for my wife and she is so happy with it.

The only thing her friends and me noticed is the horrible echo.

With case : Echo

Without Echo : No Echo

I read about te noicecanceling function and the second mic on top of the phone. I also noticed another hole above the volumerocker witch i still dont know what it is for but i tried to cover both holes during a call and the echo was almost completely gone .

She (and me) dont want to use the phone without a silicone case, so heres what i did:

I toke some black tape , cut small pieces and put 3 layers on both holes, turn incall volume a bit lower and for now no echo.

You dont see the tape cuz the case is over it so the design stays:):D

Hopefully the echo stays away and you guys and girls can use this method until samsung found a solution!!
[Galaxy S II Q&A, Help & Troubleshooting] smygel:
Im running

PDA: I9100XWKF3

Phone: I9100XXKE7

Kernel: I9100XXKH3 (Root)

Casemate Silicon Case ( Not covering any mics)

Got a call

Said it was echo

Switched on Speaker, Switched off speaker

Echo gone

Talked some more

Echo returns

Took off Case

Echo gone

Talked some more

Ended conversation

I actually thought that i got away with the damn echo with my software combo. i installed the firmware for 1 1/2 weeks ago and didn't get any echo before today.... Bollocks
[Galaxy S II Q&A, Help & Troubleshooting] lotacus:
Lol! That hole is for a lanyard and has no other function. too funny how you thought it had to do with noise cancellation. unless your upper mic is covered, you can try turning off noise reduction in the options menu when in call. You may also want to verify you or your callers are using POTS (traditional telephone lines), cell, and not any type of VOIP system, which introduces a degree of echo. As well you may want to make sure your callers do not have you on speakerphone.
[Galaxy S II Q&A, Help & Troubleshooting] yulaws:
it seems like its a software problem,

flash full stock firmware ( aprox 500mb) then restart and check if problem persists. Re-root and flash with custom rom

Problem solved for me :)
[Galaxy S II Q&A, Help & Troubleshooting] strimenos:
Problem solved

i fully block the top hole(noise reduction hole) with a piece of paper and the problem stop.

Before adding the paper i tried increasing the hole of the paper but i end up damaging the case and the problem was only minimized but not solved

A piece of paper fully solves the problem
[Galaxy S II Q&A, Help & Troubleshooting] angisbregolius:
Guys, i found this on the web and seems to be the solution to echo problem:

guys...i had the same problem with my s2....whenever i put my case on..all the callers would complain of voice echo....i spoke to samsung service center guys....at first they were confused but then they figured the problem out. Actually their is a cushion on back of the speaker of the mobile....which is not properly placed.....if not placed properly....when u put the case on ..it presses the cushion close to the speaker...which leads to the echo.....the service center guy fixed it in 10 mins.....So i would recommend u to go a service center guy and tell him the problem and he will fix it....its been over 2 days my fone is fixed and is working like a charm....Hope this helps..

My S2 is now back to service (again)...i hope they change the speaker this time...
[Galaxy S II Q&A, Help & Troubleshooting] fsheha:
A menu should now be shown. In the menu, press [5] AUDIO

…then [1] NB (VOICE CALL)

…then [1] HANDSET

…then [1] VOLUME

…then [1]SRC SPEECH RX Volume

…then [5]5_lvl: 88 (note that you might have another value than 88 on your handset. Write down this value in case you want to revert to it later)

The window that is now shown should have a line saying “Input?”. To input a new value press the menu button, then “Key Input”. Write 110 as the new value and press “OK“.

You have now adjusted the microphone volume when noise reduction is disabled, and it is time to do the same when noise reduction is turned on.

Press the menu button, and then “Back”. Do this four times in total, until you get back to the menu that the text “NB (Voice Call)” in the first row.

Now, press [7] HANDSET(2MIC) and repeat steps 4 to 8 listed above

---------- Post added at 02:10 AM ---------- Previous post was at 02:07 AM ----------

*#*#197328640#*#* dial

A menu should now be shown. In the menu, press [5] AUDIO

…then [1] NB (VOICE CALL)

…then [1] HANDSET

…then [1] VOLUME

…then [1]SRC SPEECH RX Volume

…then [5]5_lvl: 88 (note that you might have another value than 88 on your handset. Write down this value in case you want to revert to it later)

The window that is now shown should have a line saying “Input?”. To input a new value press the menu button, then “Key Input”. Write 110 as the new value and press “OK“.

You have now adjusted the microphone volume when noise reduction is disabled, and it is time to do the same when noise reduction is turned on.

Press the menu button, and then “Back”. Do this four times in total, until you get back to the menu that the text “NB (Voice Call)” in the first row.

Now, press [7] HANDSET(2MIC) and repeat steps 4 to 8 listed above​
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
Will the above steps need to be done each time we reboot? Or does it stick?
[Galaxy S II Q&A, Help & Troubleshooting] jr866gooner:
This does not stick after phone restart...