Google finally unveiled Android 4.1, aka Jelly Bean during OI 2012. The company also announced the much awaited Nexus 7 tablet and a new device Nexus Q. As expected all attendees got free Nexus Q, Nexus 7 and the Galaxy Nexus phone. All these devices were running Android 4.1, except for Galaxy Nexus which was still running Android 4.0.
To bring Jelly Bean to Galaxy Nexus, Google pushed an OTA update for Galaxy Nexus. But this update is available only for select devices. The regular Android 4.1 update is expected in July. However, if you already have unlocked Galaxy Nexus, you may try to update it manually.
XDA Developers have made available the OTA file for manual update. We don't need to warn you, if you are manually updating your device don't blame us if something goes wrong. In other words, try at your own risk.