Prevent update prompt Is there a way without rooting to prevent galaxy nexus devices from prompting that there is an update available. We have several devices at work that we would like to keep on a particular android version for development reasons and it is somewhat of an annoyance being informed  repeatedly of the same update.
You are looking for FOTAKill.apk, it kills the Firmware Over The Air (FOTA). 
"Prevents GoogleServicesFramework from downloading OTA updates"

It's a fairly standard apk used and provided with some gapps packages (google apps package, when you install a custom ROM you don't get the google apps, need to install a gapps package)..
It works for both stock and rooted ROMS

The XDA forums have more information about it and download links of the apk, it originated from the CM ROM (cyanogenmod) but works on stock as well as custom ROMs.

Source code:
https://github.com/zinx/FOTAKill

Download etc for example from here:
http://forum.xda-developers.com/showthread.php?t=1832496