iFixit

If you are reusing the LCD, it is not necessary to peel the ambient light sensor off the back face of the LCD.

Use the edge of a plastic opening tool to carefully pry the ambient light sensor board off the adhesive securing it to the display frame.

Once you've gained enough clearance, peel the ambient light sensor off the LCD.

Be careful not to crease the ambient light sensor below its top section, as the portion with adhesive applied may break off.

If necessary, attach the plastic view window to your new ambient light sensor before installation.

While holding the digitizer cable down, carefully peel back the piece of tape connecting the digitizer cable to the display frame.

Remove the three T5 Torx screws securing the clips and LCD brackets covered in EMI tape near the home button switch.

Carefully peel the display clip and its attached tape off the black plastic display frame.

If you are replacing the LCD, be sure to transfer these pieces of EMI tape and their attached clips to the new LCD.

Remove the remaining T5 Torx screws securing the LCD to the black plastic display frame.

Insert the edge of a plastic opening tool under one of the ears attached to the steel LCD frame.

Twist the plastic opening tool to gently pry the LCD up off the adhesive securing it to the front glass panel.

Be sure not to excessively bend the LCD, as it is made of glass.

Repeat the process detailed on the previous step to pry up the display around the three sides opposite the digitizer cable side of the display.

Lift the LCD from its free end, and remove it from the display frame.

Carefully peel the adhesive securing the long side of the LCD to the display frame, then remove the LCD.

If it is still stuck to the front panel, remove the strip of EMI tape near the ambient light sensor socket.

If necessary, transfer this to your new LCD.

If it is attached to the LCD and you are reusing the LCD, skip this step. If you are replacing the LCD as well, transfer the strip of EMI tape to your new LCD.