I remember the days of BBM mostly and it is surprising to see that the phone just went into extinction so fast. It was the king of it time and i thought it will be the first to adopt WhatsApp only to here they were going to stick with their BBM whereas androids were already going into using WhatsApp coupled with the fact that the chinese came with cheaper androids giving people tbe opportunity to own a smartphone so those who could not afford a BlackBerry went for an android.