Samsung galaxy j7 6 is very popular mobile in the world it can work very fast this is 4G mobile in have 2GB ram and 6.1 Android version it is very good mobile and 16 GB rom and 5.5 inch HD 13 mp primary camara 5mp front Expandable upto 128 GB this mobile like any mobile not have and it work very very fast and beautiful this mobile have fornt flash 3300 MAh Li_ lon Battery