i want to buy samsung mobile.which one is best
It's Depend on your Budget. I will recommend you Galaxy Note
Nobody can say what's best. I can tell you that I've got a Galaxy S4 and I'm very happy with it but... Is it the best? Yes, for my needs... you do need to read the details of each phone and see what suit you best
I will tell you samsung grand,it cheapest and best.
i agree, you must consider: price, your needs and what current mobile version is offering. I'm using S2, and i can say it's not so much different (by speed, camera, application availability..) from S3, or even S4...
Go for the device which fits your budget and also consider the functionality as well. Enjoy!