Recently Google started updating Nexus S smartphones to Android 4.0.
There are reports circulating that Google is occasionally pausing the update process while they monitor progress and feedback. If you are affected by a pause, when you go to Settings > About > System Updates you will be told “Your system is up to date”, even if you’re not on Android 4.0.
If you were able to download the update, click the “Reboot and Install” button, and then see “Your system is up to date” (when again, the update to Android 4.0 hasn’t happened), this is apparently a different problem – see the picture below, and that’s pretty much all the information we have at the moment.
Updating millions of phones is hard, and there are a lot of
slightly miffed outraged people out there wanting this update. If you haven’t been able to update, just wait until any bugs have been fixed, and the update process resumes. You will get a more reliable patch as a result.
In the interim, prepare for the update by backing up any important files from the USB storage area of your phone. Just connect your phone to your computer via USB cable – it will show the file storage area just like a USB drive.
To get the best upgrade experience many will factory reset their phones just before or just after the upgrade. You can backup your application data, WiFi passwords, and other settings to Google servers so they can be easily restored after a factory reset. On your Android 2.x phone go to Settings > Privacy > Back up my data