First I want to share my own personal experience with oppo F1s.I love this phone because its sound quality is very good.
I can use this phone very easily.it is very fast & smooth.
I like that slimmest body.its color & design is very beautiful.
3 Gb ram is enough for everything.camera quality is very good, rear camera comes with 13 MP and front camera comes with 16 MP.i love its 3075 mah battery, battery backup is very good. it has 5.5 inch HD display and 32 GB internal storage which is expandable up to 128 Gb.
Price of these cell phone is 17990 rs.so its in our budget phone.i love it.This is the best phone for me.