J7 is the one of the lastest mobile launage by samsung with awesome battery backup of 2days having quality of RAM and ROM as comparing other mobiles.
if you are investing your money on this so its not waste at all because as a price of this mobile and function worth it
its not hanging at all its support games which are having size of 2gb without giving any kinf of problem camera is awesome with good front flash
after all I can say this is best of all