As per earlier leaks in Feb 2017 the model number was SM-J72A, but now there is new model number SM-J730. The J7 2017 will be having a 5.5-inch 1080p display, which will be powered by Octacore 1.5GHz Exynos 7870 SoC coupled with 3GB RAM and 16GB internal storage. It will have both fronts as well as the rear camera of 12MP and support video recording up to 1080p.The Samsung Galaxy J7 2017 will be running Android 7.0 out of the box.
There is one more variant which is meant for US markets. It will be having SD 625 with 2GB RAM & 16GB internal storage.It will have 13MP rear camera nd 5 MP selfie camera.So J7 will come in two variants similar to Samsung Flagship.
As of now, there is no info about the price and launch dates. So we have to wait until Samsung officially launches it.