This only happened after the latest update, phone started to hang, never ending heating problem, then phone freeze and continuously restart on boot screen samsung update just brick my phone, i would strongly recommend to fire that employee that launc...

 I also got this freezing problem today, first searched on youtube and google for solution. then I realise that this type of problem is everywhere with samsung specially in m21 series is the worst of them all you can litraly find hundreds of videos o...