BlackBerry has just rolled out OS 10.2.1.3247 for the BlackBerry Z10 model STL100-3 running on T-Mobile USA! So to recap today OS 10.2.1.3247 was leaked to the masses, then BlackBerry started rolling out that very same OS officially. I was able to update the BlackBerry Z10 through BlackBerry Link. So get to plugging in your Z10 to your PC or Mac and start the update!
Let us know what you think about the update in the comments!