I did it for 2.3.2 so I gotta do it again. Keep us posted on if you got the update yet google said "it will be coming over the next few weeks" could be awhile.
Yes, it's suppose to fix the random reboot.
Google just announced that they have begun to push Android 2.3.3 to the Nexus S. The update is described as a small feature release that adds read and write APIs for the near field communications (NFC) chip inside the Nexus S. Other updates include new APIs for Bluetooth, graphics, media framework, and speech recognition.
Mysteriously missing from the Android 2.3.3 Version Notes is any mention of the random reboot bug that is affecting a portion of Nexus S owners. The problem was first identified last year and Google confirmed they were working on a fix, but I guess it is not ready at this time. We were told on January 28th that a fix for the reboot bug would be available within one to two weeks, but it does not appear that will happen.
If you own a Nexus S, look for the over-the-air update to hit your phone in the coming days. We will be on the look for the download link so that you can manually install the update if you do not wish to wait.
Some of the features of the Android 2.3.3 update include:
A comprehensive NFC reader/writer API that lets apps read and write to almost any standard NFC tag in use today.
Advanced Intent dispatching that gives apps more control over how/when they are launched when an NFC tag comes into range.
Some limited support for peer-to-peer connection with other NFC devices.
Your Nexus One is a second-class citizen no more: Today, Google's rolling out Android 2.3.3 to both its premier smartphones. The latest build, still referred to as Gingerbread, brings even more NFC goodies than foretold, as the Nexus S will soon be able to write (not just read) rewritable NFC tags as well as act as a glorified NFC tag itself. (You can see both possibilities in the three screenshots above.) What's more, Google tells us Android 2.3.3 will fix the random reboots that have plagued the Nexus S as of late, and offers other random bugfixes as well. You'll find the whole kit and kaboodle streaming to your phones over the air during the next few weeks to come.