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Hello, I am looking at purchasing an iPhone x with a cracked screen to fix up. Both, the bottom and top speakers don’t work. Does anyone know what may cause this? I don’t want to end up like with my iPhone 7 that needs a new board due to an audio/wifi ic fault. Thank you!!

iPhone X no speaker sound issue may occur due to a defective hardware component, like pseudo soldering. Whereas, pseudo soldering components may relate to several reasons: pseudo soldering while the iPhone leaving factory, misoperation in the repairing process or personal habits of users etc..