I wanted to take a minute to post this for you because I was having this problem and searches did not lead me to any answers. Supposedly all HTC Thunderbolt phones are to receive the second OTA update by tonight. This was created to fix some of the big issues that plague the Thunderbolt such as random reboots and inaccurate GPS both of which were exacerbated by the first OTC update in May. I was able to find the update available on Friday night by doing the usual of looking under *software update* *check new*. I accepted the download but after a minute or so noticed that the download icon had disappeared from my status bar and the update froze. I turned the phone off to clear it and repeated the above steps, only to start getting the network error message again not the update. I left the phone alone all night and tried again in the AM. Same error, so I then pulled the battery for a few minutes and when I looked the update was available and downloaded completely without a hitch. I have heard some complaining about battery life with the update but have yet to see this. Also, this will not completely resolve the issue of reboots per say, but it is supposed to slow them down. I received a brand new phone after my son decided to make mine swim and that phone in all seriousness rebooted within 15 minutes of setting up, the reboots were not as bad as my old one but would have a couple a day. I am now at 25 hours of up time without a reboot so I am holding out hope. I have no idea about the GPS as that is a feature I do not use much, but if this update enables me to use my phone efficiently as it is supposed to work I will be happy. I hope you find this info helpful if you run into the same issue with your update.