iPhone 5S crash and reboot!

[AT101ET]

My iPhone 5S crashes at least once every week. It then automatically reboots itself straight after.
At first I thought it was a software issue, but I still get the problem despite having updated.
It's not jailbroken and has at least 20GB + free space. Not running any 3rd kart certificates that I'm aware of either.
Anyone suggest anything?

 

[localboy28]

Is it on 7.1?

 

[AT101ET]

Is it on 7.1?

Yes

 

[C DM]

Try resetting your network settings to see if that might help, if not, you can try resetting all settings if not even fully restoring (perhaps even as new).