20 - 30 minutos
Had an old battery that was very tempermental when it came to functioning and I wanted to wait until the iPhone5 came out.
Repair went well. Almost botched it when it came to taking off the screen (cable #3). Didn't realize the white holder was not the clip holding the cable down and almost tore apart the holder, making my phone officially broken. Would have liked a little more detail on flipping the black (or white) clip up at the base of the display cable.
No advice other than what I put in the repair section.