I have bought samsung j7 mobile about 6 month ago in nepal but it is working fine never hang this mobile I have installed as much 30 apps in this mobile but never hang.
This mobile has a good camera quality 13mp in back and 5 mp in front due to which it gives me a good quality of picture even in night due to better flash light which helps us in also a torch light at night and also 3000 mah goo battery quality for long battery charge so it is great phone.