Vivi Y21L is a below average mobile in this price range. It comes with 1.2Ghz snapdragon processor, with 1GB Ram, 2000mAh battery, 5MP rear camera. On comparing this features to market it is not empressing enough to buy the mobile. Now a days if you are spending atleast 7000 Rs you are gonna get a desent deal of a mobile you won't be buying Vivo Y21L beacuase aparently it has less camera, and less Ram that shows that the mobile is less impressive, while you can buy MI 3s in the same price range and you will be more satisfied as a user.
