I had purchased redmi 3s prime device recently from first flash sale on flipkart.
First of all I will mention some of my likes and dislikes about the phone.
Likes
Battery. Surely amazing , the best. One can easily last 2 days with average usage
Fingerprint sensor. Blazingly fast.
UI : recently updated to miui 8 its pretty snappy no lags.
Color reproduction on screen are good.
Mettallic body feels premium in hand. 5 inch phone Looks faboulous while holding in hand
Dislikes
Camera in my opinion is sort of below average.
Hdr mode is worst. Images gets distors when taken picture from hdr mode unless you have to keep camera in the same position for few seconds.
Screen quality: its a 720 p screen I wish it should have 1080 display
Gaming: is sort of an average. Some times I notice minor lags. Also takes time to load the games.
Memory management is also not good.
Considering the price range , size and competitors in market. Overall I give 4 rating out of 5