Before the update, my Note 4 was working fine; now, it's overheating, restarts several time an hour, has a black screen about 60% of the time even though the light is blinking blue and is suuuuper slow in any application. I have removed the battery and held the power button as I was advised and it at least would boot up again after replacing the battery but the phone is still having major issues. Anyone else experiencing this type of effect from the upgrade?