A Smartphone fall into the category of best seller, only when it excels with top features. These features also manage to get grapled by the users. The question is why do the users, find interest in it?. The answer is simple, a user requires all essential functions to be incorporated in a phone in the form of bestness. Be it camera, fast processor, gaming, downloading speeds etc, these have to be operated under smooth panorama. Here are the 10 best selling mobile phones, which will come as a jaw dropping for you.