It is just that you are now using a much older version of BBM than your new OS supports and as a result, it is fixable by going to Black Berry World and updating your BBM app.(You should update all your apps actually to get the best performance).The entire process took around 45 minutes on my Priv. In addition to updating the Priv's software, Black Berry also announced it will release updates to the Camera, Keyboard, Hub & Contacts, and DTEK apps through the Play Store on Dec.
A few seconds later your Priv will restart and the installation will begin.It's a good idea to plug your Priv into the charger while the update is installed.Go for a walk, play some games or find something to distract you for a while during installation.For some users, (particularly a small segment of those rocking the Q10,) notice that their display has sort of zoomed in, with parts of the UI cut-off from the display.What happens is that for some weird reason, after updating, “Magnify Mode” is turned on on some devices.
It apparently happens because Black Berry 10 needs 2.5 times the size of a downloaded update package to install.