How to fix broken screen of Samsung Galaxy S III?

You can purchase the digitizer by itself off eBay and other sites for less than $10. The digitizer is the part of the screen that is responsible for sensing touch. So if the screen is cracked but still displays a good picture then the LCD is fine and you only need to replace the digitizer which sits right in front of the LCD behind the screens protective glass. The digitizer part comes with the protective glass already adhered to the digitizer sheet. So all you really need to do is remove the old digitizer and install the new. Be aware that the ribbon cable on the digitizer is a very fragile and can be easily damaged if not careful. The digitizer only repair is a little harder to perform then swapping whole display but with the correct tools it is not a difficult job. So if you need to save a little money you can replace just the digitizer. Best of luck on your repair and I hope my information was helpful to you.