I had a very bad experience with the samsung S Duos mobile.
I bought it long back in 2014 and the device has a lot of problems.
It has just only 768MB of RAM which does not allow me to install much applications.
If I do install the applications the mobile gets slow and hangs.
I got irritated and sold it out for half the price for which I have bought it.
Even to dial the numbers it takes at least 1 minute to show the dial pad.
I do not suggest this mobile to anyone.