Well, I am planing to buy a new smartphone heard very much about the "Xiaomi MI4" but as we all know that Samsung S6 is already leading the market. As per the specification Samsung offer Octa-Core 1.5 GHz Processor and MI4 offers "Quad-Core 2.5 GHz Processor. One of my friends using MI4 and I have checked the performance already and very satisfy with it. I haven't used the Samsung S6 so on my curious side I want to know more about this device before buying the product. I need your suggestion here.