Jelly Bean Android 4.2.2 update has been deployed a few days ago. Update it for granted Google Nexus device, the Galaxy Nexus, Nexus 7, Nexus 10 and Nexus 4. Android 4.2.2 update for the Nexus line is given via OTA method so you must be patient until the update to the Android Nexus device that you wear.
But it is different if you are using a rooted Nexus. With an Android device that has been rooted, you can install Android 4.2.2 update manually directly from server Gogole. For that you can follow the steps below.
It should be noted before you try the steps manually install Android 4.2.2 on Nexus devices, make sure you do not make modifications to the stock on the Nexus 4 RIM or install various kernel. Or, for those who live in America and use Nexus or Verizon Galaxy Nexus Sprint, cata install Android 4.2.2 is not intended for you.
1. Go to Settings> Apps in Galaxy 4, Galaxy Nexus or Nexus 7/10. Swipe to the right and select the tab 'All'
2. From the list of applications and games that have been installed, look for 'Google Services Framework' system app.
3. First of all, tap on the 'Force Stop' and then tap on the 'Clear Data'
4. Now go to About Phone> System Updates, then tap on the 'Refresh'
Depending on your location (and fortune that accompanies your Nexus), Android 4.2.2 update will appear in your belonging Nexus device. If the above steps do not successfully raise 4.2.2 update on your Nexus device, try to repeat the steps above with a device reboot after step # 3. It could be that you have to repeat this step install manual repeatedly until the Android 4.2.2 update appears on your Nexus device.
It is worth mentioning that this move is just a trick to get OTA updates directly from Google servers. So this article on How to Manually Install Android 4.2.2, good luck!