What you need
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Use a spudger to disconnect the Lightning connector ribbon cable from its socket on the logic board.
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The Lightning connector cable is lightly adhered to a shield on the logic board. Use the flat end of a spudger to gently peel the cable up.
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Holding the phone level, lift the bottom end of the logic board up enough to grasp it with your fingers.
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Pull the logic board away from the rear-facing camera just enough to expose the gold contact cap under the top end of the board.
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Remove the gold-colored contact cap from the threaded post in the rear case, and set it aside.
On reassembly, it was tricky for me to figure out where the gold clip went. It goes against the back case, upside down and holds the logic board grounding clip, mentioned in Step 34. The upper hole of the grounding clip goes into the gold one, with the opening of the gold one oriented to the right. The 1.2 mm Phillips #000 in the top side-wall, removed in Step 33, holds them both together.
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Flip the logic board up toward the volume control buttons to expose the antenna connector.
On this step, a small threaded barrel came off of the bottom of the housing, once I lifted off the logic board. Upon reassembly, it goes back in with the tiny threaded part down, into the silver piece near the rear facing camera. There is a little hole in the silver to receive it. When the logic board goes back down it matches up with a small silver hole and then secured to the rear case with the 2.7 mm standoff screw furthest to the left in the photo in Step 35. Take care not to put the barrel in upside down because it is very hard to get unscrewed once placed incorrectly.
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To reassemble your device, follow these instructions in reverse order.
To reassemble your device, follow these instructions in reverse order.