This is 1000 times better than the previous j1 its a good budget phone this device is not KNOX enables and not having theme store but you can choose 3 pre-installed themes.
It hav: -
4G support
Dual sim( micro sim)
5inch display720×1280resolution
294ppi
Android 6.0 marshmallow
Its 1.5Ghz cortex-A7 chipset
1.5GB RAM with 8GB ROM
Sd card upto 128GB
its front cam is 5mp
Back camera 8mp which records 720p videos( NO FUL HD)
2600MAH battery.
it hav only 8GB internal storage which is not enough you can expand it 128GB by sd card but I guess not everyone hav 128GB sd card. It hav 1.5GB RAM which is good enough for moderate usage if you’re very heavy gamer then this wil disappoint you. In camera section what I didn’t like is its vdo recording quality it records on 720p at 30frame per second in this price range you’ll get many phones which can shoot 1080p videos
It hav HD super AMOLED display.Samsung’s screen always very bright so I guess you’ll like its screen.you can look for some others phones also in this price range but it you want BRAND then yes this j2 is for you: -) its good phone. I hope this will help you making decision about this phone. give me your thoughts about this phone in comment??