The smartphone jungle can be confusing, but the Samsung Galaxy J7 is surprisingly easy to decipher: J for "affordable price" and 7 for "big screen". This is the lite version of the Galaxy A7, offering semi-premium features but confined to the midrange. Another way to look at it is as an E7 Plus.
Source: http://www.gsmarena.com/samsung_galaxy_j7-review-1307.php