WhatsApp is a cross-platform smartphone messenger available for BlackBerry® and 4 other major handsets. WhatsApp Messenger utilizes your existing internet . Aug 25, 2017 . WhatsApp Messenger for BlackBerry is a smartphone messenger that works between users of different phone systems and international . Compare · Opinions. Also known as BlackBerry Curve 9315 for T-Mobile. Blackberry is sharp phone but without using whatsapp it will lose value. Reply.