A:AnswerIt will fit the J3 Prime I have with one small detail it has a large opening for camera in the back that only covers the big one and the small one partially. It have in the top left edge a slot for a connector or card, and next to that one an opening to plug the headphone and other slot in the bottom edge for the same purpose I think next to the right to the charger slot which is in the very center. Hope it will help.
A:AnswerYes it will you have to make sure the package specifically says Emerge on it. There are multiple Samsung J3 devices with different names it will not fit.