How I fixed my I-phone 4 to trade in for a new one
The phone was dropped and shattered the rear panel, but the screen and phone still worked fine. It looked awful covered with tape to hold the guts in.
The repair was quick and easy. I like repairing things and was quite disappointed that it was over so quickly. (as are most fun things in life)
Watch the video and don't lose the tiny, tiny screws that came with the new back panel. The tiny screwdrivers are cool to keep to remember the experience.(and use again for something else)