Vivo Y21L is a very slow phone from vivo because the phone lack and hang very much. Battery durability was very very bad no battery back up. The phone switch off automatically when it get hang and after switch on the phone the phone work very slow. Display was small of 4.5 inch and picture quality was also not much clear. Memory card insert problem sometimes memory card was inserted but it did not shown in the phone only internal memory was display. Features are very less. Network coverage was just average not much good not much bad. Customer service was very ok. Camera quality was very bad. Processing was very slow since every saying that the phone was good. Charges and billing was very high it should be less.