Vivo Y21L is a very good smartphone under low budget segment .it is the only budget phone with two sims slots are 4G supported .moreover this vivo Y21L donot have a hanging problem .it is very easy to use.its screen comes with almost gorilla type screen.this phone donot have heating problem.it gets heated only when u put charging by oning mobile data .this phone donot have any problem other than this.vivo Y21L phone is value for money.it is very best phone under 7500rs.