Random reboot topic

Hello
i have i9506 with stock rom nj1, rooted.
1 or 2 time at day, phone freeze and reboot.

I attach logcat, it reboot after 8:20:46

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02-03 08:20:42.805 E/BluetoothPhoneService(5205): handlePreciseCallStateChange: CdmaCallsSwapped = false
02-03 08:20:42.805 E/BluetoothPhoneService(5205): swap; CONF -> THRWAY ; when 2nd call is incomming; app.cdmaPhoneCallState.IsThreeWayCallOrigStateDial ing() : false
02-03 08:20:42.805 E/BluetoothPhoneService(5205): swap; CONF -> THRWAY ; isGeneric = false
02-03 08:20:42.805 E/BluetoothPhoneService(5205): callsSwitched : false
02-03 08:20:42.805 V/AllShare(ASF-DMC)(19317): SystemEventMonitor.checkScreenState - SCREEN STATE: ON
02-03 08:20:42.805 D/AllShare(ASF-DMC)(19317): NetworkStatusListener.eventNotifyReceived - this is not NIC related event!
02-03 08:20:42.805 D/AllShare(ASF-DMC)(19317): DeviceSubscriber.eventNotifyReceived - receive system event: com.sec.android.allshare.event.EVENT_SCREEN_ON
02-03 08:20:42.805 I/AllShare(ASF_DMC)(19317): [JNI] JavaSetScreenStatus: 103: Enter AllShareFrameworkCoreNativeAPI_setScreenStatus, j_on_off=1
02-03 08:20:42.805 I/AllShare(ASF_DMC)(19317):
02-03 08:20:42.865 E/EnterpriseContainerManager(5205): ContainerPolicy Service is not yet ready!!!
02-03 08:20:44.965 E/Watchdog(981): !@Sync 125
02-03 08:20:46.705 E/WifiService(981): checkNetworkName - NullPointerException
02-03 08:20:46.715 E/WifiService(981): checkNetworkName - NullPointerException
02-03 08:21:04.615 E/BluetoothPhoneService(5205): handlePreciseCallStateChange: CdmaCallsSwapped = false
02-03 08:21:04.615 E/BluetoothPhoneService(5205): swap; CONF -> THRWAY ; when 2nd call is incomming; app.cdmaPhoneCallState.IsThreeWayCallOrigStateDial ing() : false
02-03 08:21:04.615 E/BluetoothPhoneService(5205): swap; CONF -> THRWAY ; isGeneric = false
02-03 08:21:04.615 E/BluetoothPhoneService(5205): callsSwitched : false

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