The update is only available via Samsung Kies desktop software
Samsung quietly kicked off the rollout of the Android 4.0 Ice Cream Sandwich update for the Galaxy Tab 8.9 LTE (SGH-i957). The update brings device stability improvements, as well as new features and enhancements.Keep in mind that applications, widgets, and wallpapers added on the homescreens are reset to default, but the lockscreen images will remain.
The application menu sorting, folders and home keys will also be reset, while all downloaded applications compatible with ICS will be preserved.
Furthermore, all email accounts that were added as a Social Hub or Samsung premium account will be removed. We recommend users to back up their sensitive data before proceeding.
It is also worth mentioning the Android 4.0 Ice Cream Sandwich update for AT&T Galaxy Tab 8.9 LTE is only available via Samsung Kies desktop software.