Samsung recently introduced J series in their smartphone with launch of J5 & J7. Both phones have different config. J5 is small brother of J7 in terms of specification.
J7 I android lollipop out of the box, 5.5 inch screen, 16 GB of inbuilt storage, 3000 mah battery & 1.5 Ghz octa core processor. Though android lollipop is available in phone, its customized by samsung through it own touchviz.
Samsung Galaxy J7 is exclusively available at flipkart. Performance is very smooth, specially gaming. It is 4G supported phone.
Price is Just 15, 000/- So its in category of mid range phone.Really amazing performance.