When I check for a system update, it says that there is an update available (ver 2.3.15) and it allows me to download it. After it downloads successfully, it says it must restart the phone blah blah, and I say yes and it reboots. Once it loads back up, it says that the update install was unsuccessful. I have done this 4 times now, after the first two I even did a factory reset and then did a battery pull and still, same result. Anyone have this problem/know a way to fix it?