原帖由： Kamal Ahmed ,
I research the internet for a long time and concluded that Basically it's a hardware problem. There is dust in your phone. It's actually very easy to fix. 1) grab your phone and with the top end of the phone hit a soft surface like a sofa or pillow hard a few times and it will remove the dust from the speaker. You can open it up and clean it but I wouldn't risk it.