Take a Jimmy and slide it under the glass after the adhesive has been softened.

Place a pick under the glass after lifting with the pry tool so that the screen won't re-adhere to the frame again.

Make sure to not touch the LCD edge underneath the glass layer with the metal pry tool or the cards. This can damage the ribbon cables underneath and compromise the structural integrity of the phone itself.

The corners of the screen are the most fragile part of the screen. Make sure that the entire edge of the screen is dislodged from the frame before prying at the corners.