The rear-facing camera cable may need to be pressed down slightly along the side of the camera module in order to align the connector with the socket on the logic board.
There is a magnetic component in the camera module—while moving parts around, be careful to keep any magnetic sources away from the replacement camera module.
Before peeling back the piece of tape, check the next step to locate the covered screw.
Peel the tape back only as far needed to remove the screw—the piece of tape covering the screw sticks poorly after being peeled back, and the end may stick upward slightly afterward.
Note: this comment is written for the iPhone 6 Plus, but may also apply to other models of iPhone.
The clips in the rear case attach to small slotted shapes under the edges of the display assembly, and these attachment points alternate from one side to the other. Moving from bottom to top, gently pulling the rear case away at these points will help to separate the two halves without using too much force.
Ensure that the plastic clips along the top edge of the front panel (shown in step 8) are fitted properly inside the rear case, then gently press the display assembly into the rear case at these points, moving from top to bottom. There may be a small click sound as the clips in the rear case engage with the slots on the display assembly, and the rear case should fit flush with the edges of the display assembly.
Additional hints, for anyone who needs them:
* stick the screws to the tape in the same positions as they are shown in the guide. This will make it easier to identify them during reassembly.
* if the screws get mixed together, the ‘mm’ (millimetre, millimeter) measurements given in the guide can be used to identify them. Compare the lengths of the threaded shafts to each other to determine which screw is which.