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The ear speaker flex on my iPhone X is torn and cannot be repaired. Which part of the flex is the flood illuminator and which parts do I need to transfer to keep Face ID. Pictures/videos will be much appreciated. thank you

You can see the flood illuminator in the second image here: iPhone X Earpiece Speaker and Front Sensor Assembly Replacement If you are asking which traces in the flex cable is responsible for the flood illuminator, I can’t help you with that. As far as I understand, unfortunately the entire front sensor assembly is paired with the iPhone and must be transferred over to retain FaceID