Samsung Tab P7500. How to upgrade to Ice Cream Sandwich?
No official update to ICS is currently available for your device. However, Samsung says that they will be providing either an ICS update (Ice Cream Sandwich), or a feature upgrade that provides similar capabilities as ICS.

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  NOTE: The following Ice Cream Sandwich (ICS) tutorial can support you upgrading your Galaxy >S II to Android 4.0 ICS. It will be available for other Galaxy devices shortly.
  For select models where ICS will not be available a feature update alternative will be >offered giving similar functionality to ICS.