Use a razor, and go along the outside of the phone carevilly using the razor as a spudger. it will efficiently cut and weaken the adhesive while spudging the screen away from the frame. only takes 15 mins.... Use a workbench razor, not a flimsy one. If possible, use one where one side of the razor has a gaurd on it for better grip. Take it slow and try not to scratch the frame. Lots of pressure and patience is key!!!

Goodluck!!

-J

I had such a probem with one on each side closest to the home button.... Unfortunatley I used wire cutters to remove the screw completly. The assembly was not effected nor the functionality of the phone.

What happens if the cup won't even stick to the display because it is cracked and it will not hold air near the bottom of the phone?