Verizon Wireless today announced Android 4.1 Jelly Bean software upgrade (version JRO03O), for Galaxy Nexus by Samsung. The Jelly Bean upgrade will be pushed out in phases over Wi-Fi only and it adds features such as Google Now, improved voice search and dictation, more useful notifications, a better keyboard, and many others.
You can check if the software is available for their device by going to Settings > About Phone > System Updates. If the upgrade is available, a notification will be displayed and you will need to connect to a Wi-Fi network to complete the download (size: 146.6MB).
Source:- Verizon Wireless