If the glass/LCD is cracked, has a distorted image, no image, or is malfunctioning.
If your phone fell into salt water, dirty water, or something other than water.
If your device is not charging, not holding a charge, or dying faster than it should.
If the button does not respond, is jammed, or is removed.
If the button does not respond, is jammed, or is removed.
If the button does not respond, is jammed, or is removed.