Vivo y21 is a very good Android phone in less price. The speed of this mobile is much faster then other mobile of this range.In this mobile there is 1gb ram and 16gb Rom.It has 5mp back and 2mp front camera. But the is as much better as that of 8 mega pixel in other brands such as micromax, Lenovo etc. Battery backup is also very good. The brand like micromax and other hang when a huge size of game opened in it but in this you can install as huge game as possible it does not hangs. It is true because I have also played gta vice city in it.