BlackBerry sales have slumped in the U.S. but is still strong in emerging markets . Not too many bells and whistles . New models users should understand why they are popular in developing world . In places like Brazil and South Africa , the key is the update to their current phone . in Sub - Saharan Africa there is expected to be 175 million new customers in the next five years .
BlackBerry sales have slumped in the U.S. but is still strong in emerging markets . New models users should understand why they are popular in developing world . In places like Brazil and South Africa , the key is the update to their current phone . in Sub - Saharan Africa there is expected to be 175 million new customers in the next five years .