It’s time once again for the Windows Mobile 6.1 update roll call. Now, it’s the turn of those using the Samsung BlackJack II on AT&T to get their fill of enhancements. You can expect the same bundle of goodies found in the other previously released updates so you've got every reason in the world to upgrade now. Two versions, Vista and XP, are available depending on what OS you’re using on your PC so be wary which one you're downloading.
As usual, remember to back-up before installing, remove your SIM and read the instructions carefully so you don't screw things up in the process. If you’re ready, start downloading now because it's quite large file measuring in at 70MB in size.
[source]