In a world filled with free communication apps like Viber, WhatsApp, Facebook (and Messenger), Google Hangouts and iMessage, BlackBerry Messenger was able to carve a serious user base for itself it just a week.
Blackberry inarudi kwa nguvu kubwa kwenye soko la social media,
kwa walioanza kuibeza wanaweza kurejesha matumaini yao kwa cm hiyo iliyotamba miaka ya nyuma.