Redmi 3S prime is best smartphone in this price you can get today. At 9k it provides amazing features that no other brand can provide you.
Pros-
Battery backup is great
Performance is great
Fingerprint scanner is fast
It has IR blaster
Cons-
Camera is good but not great
So if you are looking for a smartphone at this price. This is best smartphone you can get at this price today.
If you want more powerful processor and bigger display, increase your budget by 1000rs and go for redmi note 4 or you can wait for redmi 4 and 4 prime, which are great phones and will be launching in India on 16th may.