I've done this repair and it's a lot of work. You have to open the iPhone from the back to replace it. While you can buy the whole display assembly I did it with just purchasing the touch digitizer. It's a little more difficult but will save you $40. Shop around on eBay for the touch screen. Don't buy from China on this one. Read through the step by step on how to remove the display assembly and then check out youtube videos on how to separate the touch digitizer from the main display assembly. You're gonna need a hair dryer and one of the plastic pry tools. You can do it. I did that as the first thing I'd ever done on an iPhone. Take it slow when disassembling don't rush things. If something isn't coming easy don't pull harder. I did and tore a ribbon cable. Best of luck!