Samsung has always been having the problem of hang it always gets hanged as it is not good for a lot of big games the only thing good in samsung phones is the resale value when we buy something we always think abiut the resale value that samsung give.
About jb it hangs a lot I have been using it since 1 year and it crashesh in big games but it will not give you the features that vivo and other phones are giving at the same range but for the people who have a habbit of using their phones roughly should go with samsung j2.
Atlast I want to tell you that it also has a problem of heat thats another issue samsung is working on.
J2 is a good piece small and easy to use for those who uae very standardly should go with this.
For the young genration and teens u should try another phone.