The Samsung Galaxy Tab 10.1 3G which is available in the U.S. through T-Mobile is now receiving the Android 4.0 Ice Cream Sandwich (ICS) software update which includes Android 4.0.4 along with other features and improvements
You can obtain the update by connecting your tablet to your computer and running the Samsung Kies software.
[NOTE] This update will not be available Over-the-Air (OTA) update. T-Mobile has also advised users that the Ice Cream Sandwich update will wipe the home screen layout.
What's new in the Android 4.0.4 Ice Cream Sandwich update for the Samsung Galaxy Tab 10.1 3G
- Android 4.0.4 Security and performance updates
- Software version T859UVLH6
- Android Ice Cream Sandwich features and improvements
- Notifications via Android Notifications
- Future updates will be manual updates only.
- Samsung TouchWiz UI updates
You will find more information on the update along with instructions on downloading the update by following the source link.
source : T-Mobile