I have had two attempts to fix a screen protector to my Blackberry and every time either a small dust particle or air bubbles were trapped underneath. So those two have been thrown away. However I still have another four attempts to get at least one right. Some say that attempting to fix one of these screen protectors to a Blackberry without leaving any dust or air bubbles underneath,should be in the London 2012 Olympics. At least the person who is successful at fixing one of these will win a medal.