Android Question

Samsung pad2 10.1 cant find out how to split screens?
My new Gallext tab 2 10.1 hasn't received the upgrade to allow you to have duel screens side by side like the note.....I have read that any tab with 4.1.2 upgrade should be able to do it....mine won't.
Anyone know when the uupgrade will happen?
I have 4.1.2 so should it work?
I already know how to find it if I have it by the way. HA HA HA