BlackBerry Messenger 188.8.131.52
the author of this app says:
Battery life has been improved with the latest BlackBerry Messenger. This version also addresses some of the issues identified in BlackBerry Messenger 184.108.40.206, such as file transfer not working or working slowly, no file preview, and file transfer requests expiring after a short period of time. This version does not include any new features. The Check Spelling As You Type feature has been restored for all devices.
Camera enabled devices can also scan QR Codes.
BlackBerry Device Software Version 4.5.0 or higher. PayPal account required to purchase app from BlackBerry App World.