BlackBerry is really pushing the developments for BBM on cross-platform hard as they just released an update that will support more Android devices as well as fixing a few bugs.
The update is available in the Google Play Store and could be downloaded here. Feel free to add me on BBM, PIN: 2AF2FB53. If you are an iPhone user, don’t worry BlackBerry is ironing out any bugs in the iOS7 version of the app as well.