In this xiaomi redmi 4 smartphone in coming three new variant 2GB ram, 3GB ram and 4Gb ram.
But in there common things is processor is same of snapdragon 435 with 1.4Ghz processor.
Also camera is same in 13mp rear camera and 5mp selfi camera with 5inch ( IPS) display.
Also there a fingerprint scanner feature in this smartphone. In redmi 4 we see the android 6 version is not latest.
The main important things is price
There are redmi 4 gives 2GB ram and 16GB storage in 7000rs.
3GB ram and 32GB storage in 9000rs also 4GB ram and 64GB storage in 11000rs with hybrid slim slot.
In there first two smartphone budget is good but 4GB ram and 64GB storage in 11000 is not high but not good beacuse if you add one more 1000rs then you get a redmi note 4 which is very good smartphone.