Blackberry messenger for android and iphone
Just released on the App Store for iPhone usershttps://itunes.apple.com/gb/app/bbm/id690046600?mt=8
For android users https://play.google.com/store/apps/details?id=com.bbm
Downloaded it myself last night and set it up this morning. Must say it's pretty good to have BBM back. Loved it on my BlackBerry.