My phone worked normally till three days before. the problem started when i was far way from home and didn't have the charger, battery was dying and i let the phone turn off itself when battery got 0%. when i went back home i put phone in charge,turned on and let it charging for all the night. i wake up in the morning and saw phone was off turned it on again, after a couple of hours phone turned off again and again itself. i find out that when i leave an opened software in phone it won't turn off so i made this for two days but it was annoying so i made a reset factory after this phone started more often to turn off itself. changed the time of screen time out from 30 sec to 5 min so it won't turn off again. please help me because i like a lot this phone and am out of plan. if someone know the solution please help me.