64GB from 32GB, the ability of Verizon techs to use remote diagnostics to check out your phone from their office, an improvement in network connectivity and in spell check functionality. Additionally, the Verizon app store has been removed, as have the notices "Merge with Google" and "Merge with Samsung" from the contact menu. And multimedia messages no longer show when a user sends a group text message. The new notifications feature allows you to call a number directly from the notifications screen.
The update is a rather hefty 403.6MB and takes about 15-20 minutes to download it, and another 15-20 minutes to install it. If you received the notification that the update has arrived, you can choose to defer the installation process and you will be reminded after each 30 minutes until the task is completed, or you select another option.
source: Verizon via IntoMobile