I am not using this phone but my sister is using this phone.
Samsung galaxy j2 is at Rs7500 with 1gb and 8gb rom.8mp rear camera .when I used this mobile is very slow and hang more.
It has only 1gb ram at this price Redmi mobiles have 2gb and 3gb ram.Its screen size is not much wide. It has very low battery backup.It has to charge again and again while using internet.It does not have so good selfie camera .It is weighted mobile. So friends I suggest not to buy Samsung Galaxy J2 .Instead of it you can by a very useful and fastest Redmi phone at this prices.
Thank you!