Good lord!
I've had my phone since April 1 or so and rebooted maybe 3 times. And then every OS upgrade reboots, so maybe 5-6 total?
Zero problems which rebooting might solve. Misbehaving apps can be forcequit. Power cycling is absolutely pointless on this device, military hardware really has nothing to do with Apple phones. The phone doesn't even shut itself off when you let the battery drain, it just goes to sleep. And the Mute switch works great to avoid phone call noise when you don't want it.