phone restart by itself

[VNT]

hi guys, dunno if u guys had the same problem like mine, after upgraded to 7.0, my phone always restart by itself, at least 3 times a day. also some app like FB, Instagram...etc. sometimes it said app not responding and i have to open it again. is there anyway to fix it?
thanks.

[VNT]

got 2 reboot yesterday, while watching video on youtube the 2nd time was when i trying to change the theme of my keyboard

[shenlong]

Did you enable stamina mode? If you do, change it to Performance mode and see if there is the same issues.

You can also check the Settings > Support menu to see the not responding app and apps that take up lots of memory.