Answer to "Replacement Battery - Reboot Issue"Hi, from my experience, this has nothing to do with connector/ribbons/etc. It would just be a bad spare. I replaced my iPhone 3GS battery and it randomly rebooted the device. Then I installed the oroginal battery and it didn't reboot, so after a few installations of old (Apple battery) and the new one, it was always the same: with the new one my iPhone rebooted every few minutes, while it was OK with the original one. So I contacted the provider and they gave me another spare. When installing this second spare, everything went fine. So, asumming you re-assemble the iPhone fine, if it keeps rebooting, just ask for another replacement. Hope it helps. (my provider was not ifixit, as they do not ship to Spain, but I just want to help all you).