To install a screen protector for your Android device, clean the screen with a microfiber cloth. Peel the screen protector side labeled with a number one, and carefully stick it to the screen. Remove bubbles flattening the protector with a credit card, and peel the other side of the protector.
When installing a screen protector to an Android smartphone, make sure that the device's screen is clean and the process is done in a dry, dust-free area. Any dust that gets caught between the protective film and the screen will create an air bubble that can ruin the screen protector.