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Moisture A damaged or worn speaker The speaker being driven too hard at high volume Less commonly, an audio-processing/software problem I’d avoid repeatedly blasting it at full volume, since that can make an already damaged speaker sound worse. If you tell me your phone model and when the crackling started, I can help narrow down what’s likely wrong.

Because when its crackling, then thats dust or fragments of food

Oh that happened to me, maybe clean the speakers?

my pc infected some many times that i dont care anymore, same as pc

guys check the morse code below