If you see something on your screen that looks like a crack or it’s not working properly, there is a chance that your screen might be cracked. This happens when the glass from the display or digitizer breaks and gets stuck between two layers of glass. If you can remove the broken pieces, they can be fixed by replacing only those 2 parts. But if you cannot remove these pieces, then it's time to buy a new phone just to avoid further damage from happening again.