So I have had the call echo issue for some time. Specifically once I started flashing ICS leaks left and right, but come to find out our issue is HARDWARE related rather than software related. To be clear this is a fix for the caller echo issue where the person you are talking to on the phone hears their own voice echoing back to them.
This thread pretty much sums up the whole thing.
http://xdaforums.com/showthread.php?t=1441510
Cliff notes: There is a speaker that has come loose in your phone either from some suspect glue, or perhaps even a rough tumble if you've dropped your phone once or twice. Once this happens, the nearby NC (noise cancellation) microphone picks it up and the call echo follows.
The fix here is very simple, you just need to unscrew the 6 tiny screws (careful not to strip them, and remove and reinstall them in the same order) and then pop off the casing that protects your T-989's innards. While the thread (and pics) above are for the international Galaxy SII, the important part at the top that needs to be covered (the speaker) is the same.
I tried the fix without really doing anything except removing the casing, cutting a small sliver of an old business card to put on top of the speaker, and closing and screwing the case back on. Didn't mess with anything else, and the fix works great. I called a couple people before I reinstalled the screws and I encourage everyone to make a test call to make sure the echo is gone before putting everything back together.
This is a really simple/easy fix to get rid of the call echo, and it explains while some people have the echo with/without a case and to varying degrees. But I'm now enjoying Racing's UCLD ICS Rom with no call echo and all is right in the world.
If anyone needs anymore help just let me know, and those of you that have the echo and try this please report back.
This thread pretty much sums up the whole thing.
http://xdaforums.com/showthread.php?t=1441510
Cliff notes: There is a speaker that has come loose in your phone either from some suspect glue, or perhaps even a rough tumble if you've dropped your phone once or twice. Once this happens, the nearby NC (noise cancellation) microphone picks it up and the call echo follows.
The fix here is very simple, you just need to unscrew the 6 tiny screws (careful not to strip them, and remove and reinstall them in the same order) and then pop off the casing that protects your T-989's innards. While the thread (and pics) above are for the international Galaxy SII, the important part at the top that needs to be covered (the speaker) is the same.
I tried the fix without really doing anything except removing the casing, cutting a small sliver of an old business card to put on top of the speaker, and closing and screwing the case back on. Didn't mess with anything else, and the fix works great. I called a couple people before I reinstalled the screws and I encourage everyone to make a test call to make sure the echo is gone before putting everything back together.
This is a really simple/easy fix to get rid of the call echo, and it explains while some people have the echo with/without a case and to varying degrees. But I'm now enjoying Racing's UCLD ICS Rom with no call echo and all is right in the world.
If anyone needs anymore help just let me know, and those of you that have the echo and try this please report back.