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Original topic:

S21 Ultra Speaker Issue

(Topic created on: 19-09-2023 12:02 PM)
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Snortyblog
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Hello All, I've recently (and suddenly) had both my earpiece speaker and loudspeaker develop a horrendous crackle on my phone. A lot of forums suggest pressure changes being the issue, so to remove the sim card tray, but this does not help. However, if I put my mouth round the sim tray opening and apply a minute amount of air pressure, the crackling and distortion stops. This resumes as soo as I remove my mouth again. 
Do I need new speakers? Or is there a way for me to seal pressure within the phone? 😅 
Any insight would be greatly appreciated. 
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VTraised
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A little late but I just randomly developed a similar issue, the top speaker would crackle at high volume. I read your post saying you blew into the sim tray slot, and I decided to blow VERY hard and the crackling got worse, but when I stopped it was gone. Maybe try that?

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