I have used xiaomi redmi note 3 for a year and I have to say it was the best budget phone I have used by far. it stands on top compared to other phones in that price range in every aspect.
The camera of the phone is very good. the photo and video clarity is sharp and clean with many editing options. as for other features of the phone, The Ram is 3gb which is more than sufficient and performs smoothly without any lags.
It snapdragon processor and it is hexacore which is rare in that price range.
The Battery is li-po 4150 mhz which is extremely good. I can use it for a entire day once charged fully.
The OS of the phone is very smooth and elegant, it felt like I am using a iPhone almost that good.
This Phone is full metal body with round edges and it feels wonderful to hold, not many phones in the market out there in this budget range are fully metal body phones. The Phone runs on android lollipop which can be upgraded to newest android versions.
It also has other cool features in it. overall this phone is a complete win win for the customers. I highly recommend this phone if you are looking for phones within 9-12k range.
It is available on flipkart and Amazon.