Small hands are an asset if you need to repair your iPhone
20 - 30 Minuten
The power button on the top of my iPhone 3GS broke off. I suppose that's not too bad after more than 2 years of use. When I saw that the part was inexpensive, I figured that I could probably make this phone limp along until the next generation of iPhone or better Droids come to market. When I saw the procedure, I figured that I would replace the battery at the same time. It's really no additional work, and my old battery was just not up to par any longer.
Works great after the repair... 100% back in service and fully functional. Battery was 85% charged already, when I received it.
The repair itself was not so simple as it appears. Lucky for me, I bought the "spudger" that iFixit recommends, or I don't think I could've done this repair easily. Very helpful tool. The ribbon cables that you have to disconnect for disassembly and then reconnect when you're closing up the iPhone are very tiny ... and the screws that hold down the CPU board are even worse!
Get a magnetized phillips jeweler's screwdriver (or magnetize it temporarily yourself) before you start this job. Have a small container with seperators in it to keep the screws and clips in. It's hard to tell the screws apart after you take them out of the iPhone. Have small hands and fingers! It might be impossible to do this job if your fingers are much larger than mine.
iPhone 3G and 3GS Power Button
iPhone 3GS Replacement Battery