After updating my Samsung S4 from MK2 to NC5 release I'm having issues with the phone freezing in sleep mode. Multiple times throughout the day when the device is locked (screen timed out) and I go to wake it up (enter security password) the screen is black and device is frozen. It won't "wake up" or allow any input. Only fix is to hold down power button to "restart" or do battery pull.
Any advice?
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