This mobile has very less features at 7000rs price rate it is it has only 1 GB RAM and 8 GB RAM and their prices 7000 Rupees. It has rear camera 5mp and front camera 2MP which is very less it’s the screen size is not so big it is only for 4.5 inch. It has battery backup only 2000mAH which fastly. It hangs when the space is near to you full. At this price xiaomi smartphones have very good features and best camera quality so at price 7000 Rupees it is best to buy xiaomi phone then the Vivo. For 700 rupees the latest redmi Y1 has 16mp camera.
So friends I suggest not to buy Vivo Y 21 and can buy redmi phones at this price
Thank you! .