Try this, it worked for me on first try.
Force CheckIn - Galaxy Nexus Update Trick , Manual Update Link Attached !! ~ EXPLORE IT
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Guys try this, It worked for me in first try.
Requirements :
Fully stock Galaxy Nexus device
Wifi Connection to download the software update
The Following steps to be Followed :
Go into Setting -> Apps -> All -> Google Services Framework
You will see a button for ?Clear Data?; clear it.
Go into your dialer and type *#*#2432546#*#* - This will cause a ?force checkin?. You will notice that it shows ?checkin succeeded? across the top.
Go back to Setting -> About Phone -> System updates and then click the check now button.