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Hello, i have a question. I don’t found it on iFixit.com. I bought ear speaker (on the left side.) Ear speaker from iPhone X (on the right side). How do i replace it? can i disconnect flex cable with microphone, …? How? Thank you :)

I don’t have an iPhone X in front of me but the proximity sensor is soldered onto the ear speaker (the two gold pads). You should order an ear speaker that has the proximity sensor pre-installed, like this one here. UPDATE Currently there are all kinds of issues regarding Face ID and the Ambient Light Sensor. If these things are important, then you need to go to Apple to have the whole screen assembly replaced.