No sound from galaxy note

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I just received my galaxy note n7000 back from Samsung service centre after 2 months wait.
However, I noticed the phone speaker does not work somehow. Yesterday, I was able to call and hear notification sounds for a while and then I lost all the sounds from the phone after few hours later. I decided to talk to samsung tech team but when I looked my phone again this morning, it worked perfectly. Everything worked again. However, now I don't hear anything from the phone again. I have no idea what is going on since it worked this morning. I wanted to ask you guys first since I seriously don't want to wait another 2 months to use my phone and I believe it might be related to software bug since the sound worked again. Is there any known issue with that?

if u think it's sw related then flash a stock rom from ur region thru pc Odin.

it might be the volume bug ringer issue, try to simulate by increasing the volume under settings >sounds.. notifications, systems, media, ringtones and etc...

use your phone as you would use it and check back those settings again if they've been lowered or decreased by one notch. If you do notice that, then definitely it's a bug on the stock ICS firmware.

Same Problem

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I am having the same problem. I'm pretty sure it's a hardware problem, as I've tried changing all kinds of settings, turning the device completely off and back on, etc. And none of it makes any difference. It just doesn't work at all sometimes, and works just fine other times. I've even had it stop working in the middle of playing a sound.

Anyone know anything about this, or if there's any fix for it? I guess I'm going to try to get my device replaced, as it is still under warranty. I'm just worried that everything's going to work fine when I go to get it replaced, only to stop working once I get home.