Poland and Brazil are the first two countries to receive Android 2.3.4 for Galaxy S II. The XXKG5 and UHKG7 updates are available on Kies for users using Galaxy S II with Polish (XEO) and Brazilian (TTT) CSC respectively. The Android 2.3.4 is the latest Gingerbread update and most probably the last one before Google bumps the Android OS to Ice Cream Sandwich.
Interestingly, the KG5 update is missing Google Talk’s video functionality which is one of the main features in v2.3.4.
Samsung will release the 2.3.4 update in other regions soon or you can use Odin to flash the above mentioned firmware.