Samsung Galaxy J7 is complete worth of your money, its a complete 4G mobile and very good to use with a very high(13 MP) main camera as well as selfie camera(8 MP), battery 3000 mAH which is also very good, nice 5 inch screen and 16 GB internal memory expendable up to 128 GB.
the only problem with the mobile is its RAM which is just 1.5 GB so the mobile tends to hang up a bit if overloaded or too much applications are installed in it.
So be careful while using it.