If the digitizer is not equipped the side rails and volume button you will need to remove them and reassemble them on your new digitizer. Use a flat pry tool and begin on either end of either side of the digitizer. Slowly and gently slide the pry tool between the rail and the digitizer lifting up.

Pay close attention to the right side as the volume button will come loose. Also you will want to remove the volume button flex cable. It helps to use a slight amount of heat over the cable to loosen the adhesive. Then use a flat pry tool to carefully remove the cable. Reassemble the flex cable, volume button and rails to new digitizer.