Although the electrical components of cell phones can survive quite a few drops and even being stepped on, the plastic phone casing may develop cracks from such abuse. Although many people think they must get a new phone when this happens, you can repair cracks in cell phone plastic yourself at minimal cost with super glue. Applied the correct way, this glue will not seep into the phone and damage the electrical equipment within.
Moisten the tip of a cotton swab with super glue. Do not soak the swab.
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Gently pull the crack apart with your fingers. Do not try to force open the crack, you only need to open it a millimeter to make sure the glue gets into the crack.
Apply the glue to the crack with the cotton swab while you are holding the crack open. Try to keep the glue in and on the crack, not on the surrounding plastic.
Push the crack together with your fingers. Place the rubber band around the phone to keep the crack held together while the glue dries, which will take about one hour.
Remove the rubber band once the glue dries. Moisten the tip of a cotton swab with nail polish remover and wipe any excess glue away. Be careful not to wipe too much from the crack or the glue will dissolve and you will have to repair it again.