Actually I am using this phone nowadays and would also like to share my opinion about this phone in the following points :
1 : The sound reception quality of this phone is fantastic, it's sound can be heard clearly from a distance away.
2 : Applications access very smoothly, easy to use and many more useful things like the OPPO App Store.
3 : It's style and design is not so effective as per the cost and I also think that they can improve its design by having more attention on it.
4 : OPPO A37f runs on Android 5.1.1 Lollipop OS along with ColorOS on top. It is a dual SIM Smartphone, supports microSD card and has a 2630 mAh battery.
5 : Oppo A37f Price starts at Rs. 9, 590. The lowest price of Oppo A37f is at Flipkart, which is 4 percent less than the cost of A37f at Amazon ( Rs. 9, 990) .
I would like to recommend it to others.