I downloaded the flipkart app on my friend’s Samsung Note 4 and found capable of writing a review after going through the following steps:
Open the app and select the product to review.Scroll down the product page to find out “Ratings & Reviews” section where you can see a clickable link option titled as “RATE AND WRITE A REVIEW”Just click the link mentioned above.You need to login if you’re not and in such case you face a dialogue box where you need to put your mobile number as your Login ID and Password. If you already logged in then you may not have to face such situation or follow this step.Now you can easily find an option to rate that particular product or write a review comment about that particular product.