Last weekend, the folks over at BriefMobile had leaked the official Android 4.0.4 Ice Cream Sandwich version of the Nexus S 4G. If you own a Nexus S 4G, and have not yet installed the leaked update on your phone until now but are planning on doing so, wait! Beginning from today, Sprint has officially started rolling out the Android 4.0.4 update for the Nexus S 4G.

The NS 4G never got the original Android 4.0 Ice Cream Sandwich update, so quite a lot of users will be jumping directly from Android 2.3 to Android 4.0.4. For the unknown, the Android 4.0 update is possibly the biggest update ever in the history of this open-source mobile OS.

The ICS update includes a new and polished UI, GPU rendering, a new launcher with a sliding menu drawer, the ability to monitor data usage of individual apps, Android Beam, Holo theme for apps, a new and enhanced notification bar, new lock screen, a new camera app, an enhanced version of the Contacts app known as the People’s app, a new multi-tasking UI and a magazine like swipe UI throughout the OS.

If you have not already received the OTA update from Sprint on your handset, it should pop-up on your handset in the next few days.