I wonder why Blackberry mobiles are pupolar...

BlackBerry is really popular in developing countries like India , Indonesia and Africa because people in here are budget minded and don't really give a damn as long as their phones gets their work done .That's why brands like Nokia and BlackBerry are still popular there . BlackBerry is very popular among the youths because of its really powerful bbm feature and many mobile companies offer bbm service at a very cheap rate . Also BlackBerry keyboard is really amazing if you are a heavy texter . Typing on BlackBerry is much better than on a touchscreen .

Well, my knowledge in the field of mobile phones, it is very limited. In fact I own a simple smartfone LG L3. I know, just to have seen it in stores on blackberry, I know that the thing that makes it stand out in a particular way compared to other phones, lies in the fact that it has an alphanumeric keyboard that contains all the letters of the alphabet. I frankly speaking, I do not find it comfortable using blackberry, for the simple reason that I have the "big fingers", while in the blackberry keys are small. As to your final question, I do not know what the blackberry has more than its competitors.