Nokia has released a software update for the Nokia Lumia 800 Windows Phone. While the update (1600.2483.8106.11500) is just titled 'NOKIA Update for Windows Phone'. The update is supposed to fix the battery issue which has been plaging the device since it was launched
To update your Lumia 800 to the latest version of Windows Phone, connect it to your Zune desktop client and follow the steps for the device to be updated. If you are having any issues with the update make sure you perform a rest by heading over to Settings > About
[UPDATE] Several users have been complaining about problems they have faced after performing this update. They have even pointed out some new bugs after performing the update. If you have not updated your device, we advise you to keep away from it, until the update has been fixed or a newer update has been released. If you have already updated, try resetting your phone.