Before buying the parts, watch a youtube video on how to do it. They keep making it harder and harder. Usually the bigger the assembly you buy, the easier the fix will be and the less likely you are to mess it up. The 3s was super easy, the 4 harder to do, and the 5 I have not seen yet but I bet it is even more complicated. Keep in mind that the replacement glass is not of the same quality and will likely break a LOT easier than the original. Based on my personal experience of having gone through 6 screens over 3 years with my old 3s, I have deemed it not-that-frugal to DIY the repair. of iPhone screens.
