Complex sentence: The installed Android version has been stripped of some functionality compared to similar tablets running Android 2.2, most notably the absence of the pre-installed Android Market service, which was supposed to be corrected with a future update of Android.
Split into simpler sentences: The installed Android version has been stripped of some functionality compared to similar tablets running Android 2.2. The tablet does not come with Android Market pre-installed, but was supposed to be fixed with a future update of Android.