You want to buy a smartphone with advance feature and the best option, then you need to keep new things in mind.you must check the processor , camera, battery, storage and operating system from the display of the smartphone, because if these things are advanced then your smartphone will neither hang nor slow.The phone you are going to buy, then first of all, you should Quard-core or Snapdragon your phone.if you want, buy awith Snapdragon 845 processer beca