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Ear speaker is important for every cell phone when damage ear speaker then ear speaker is not work or low sound or bad noise. Now I post here nokia 1202 ear speaker solution
How to do this work : This red mark ic is one kind of switching ic.This ic just connect with ear speaker and loud speaker.When phone calling with normal mode sound then work ear only speaker when you active loud mode then working loud speaker.So when ear speaker not work then replace this ic.