10 - 30 minuten
My wife's iPhone 4S had a shattered screen, a broken power button, and a battery that had seen better days.
Repair was tedious, but not overly difficult. I was prepared for the adhesive to be more stubborn, but it wasn't. The hardest part was figuring out how to merge the two guides as both the display replacement and the power cable replacement require almost complete dis-assembly. I found that it was easiest to remove the old screen, then replace the power cable, and then install the new screen and finish the re-assembly.
My wife has a new iPhone 6, but we now have a working iPhone 4S we can use as an iPod for our kids to keep their grubby meathooks off the new shiny.
I also found it easiest to take a long piece of drawing paper from my kid's stash (an IKEA roll) and tape to my table to provide a nice white surface to work on in case I dropped any screws. I also went through the entire list of directions and wrote down on the side any step numbers where screws were removed and, if required, the colors for each screw. That way when I removed them I already had a spot to tape them down and prevent them from getting mixed up.
iPhone 4S Screen
iPhone 4S Home Button
iPhone 4S Replacement Battery
iPhone 4S Power and Sensor Cable