use a scissor,knife,Spanner,it won't break easily,and the mobile won't be broken. Have you ever seen a glass screen protector for mobile before?No matter you use a scissor,knife,Spanner,it won't break easily,and the mobile won't be broken only if the glass screen protector became pieces first. Tempered Glass Screen Protective Film Glass Film for i9300High quality tempered glass, strong, not easy ...