20 - 30 minuten
Battery was flaky, didn't matter what the % left would say, she would just die when it wanted to.
Figured it must be the battery as the phone was in use for 3 years.
The tear down instructions where GREAT! EVERYTHING in the instructions was spot on. The tools provided worked well and I especially liked the magnetic screw driver, as it would have been much more difficult putting it back together without one.
Your warned about the small pointed ground tab. It is pointed and catches on the side of the case (the case has a small lip which doesn't allow for the ground tab to slide out, it must be physically moved over this lip) when removing board. So be careful. I just about busted it when reinstalling as I didn't have the board in just right and had to remove it, the ground tab was hung up on the case
I'd like to see real, re-install instructions instead of just mentioning the re-install in the tear down part of the guide.
If your iPhone is 3 years old, do yourself a favour and buy this kit, it is easy and well worth the small cost.