At first, you need to clean your phone with what alcohol, cloth and dust remover.
Then put the alignment kit on the phone.
The alignment kit is included in your box.
Now take out your screen protector.
Peel off the cover of screen Protector slowly.
Put the screen protector on the phone and do not press or touch the surface with your finger.
If you press, the surface with your hands there will be many annoying bubbles.
Use scratch card to press the surface from top to bottom slowly.
There will be bubbles if you press too fast or too hard.
Take off the alignment kit then press the edge with scratch card slowly.
If there is any small bubble, you can slowly take off the edge of screen protector and remove the bubble and re apply the affected portion as in video on product page .