Which version of Samsung I9 100 is better?

Because there are knockoffs, clones and refurbished machines on the market, it is impossible to identify whether the mobile phone is a refurbished machine by serial number and IMEI number. In order to ensure the rights and interests, it is recommended to buy genuine brand-new licensed Samsung products listed in China. If necessary, it is recommended to buy in regular mobile phone stores, such as Samsung designated stores, Samsung Mall, Tmall Samsung official flagship store, large shopping malls and so on.