Carefully remove the battery pack from the phone using your hand. The battery is glued in placed by a strip of adhesive on the top side so some force may be necessary.
There are fragile tabs on the left and right side of the battery, be careful not to break them off.
Using a plastic opening tool, lift the copper sheet heat strip from the body of the phone by sticking the tool into one of the upper corner of the copper sheet and slowly sliding it along the edges.
Using a plastic opening tool, disconnect the display cable from the side of the motherboard by carefully sticking the tool underneath the display cable and gently pulling outward.
There are four black plastic retainers, two on each side, that keep the motherboard fix in place. To get the motherboard out, stick a plastic opening tool under one top corner of the motherboard and carefully lift upward using a small amount of force to pop this side of the motherboard out of the plastic retainers.
Be careful not to break the black plastic retainers as these are needed to put the motherboard back in place.
Once the screen has been separated from the backing, remove the display cable out of the hole in the top of the phone body.
You don't need to be careful removing this cable because it will be replaced by a new cable along with the new display. If you want to save it, rotate the display as you separate the display from the backing.
Carefully feed the antenna cables of the new display through the appropriate holes in the housing.
Reattach the phone display with adhesive. You can either use the old adhesive (if it is in good enough condition), or newly purchased adhesive (2 mm thick, double sided).