Having a device not work properly after a software update is terrible, The_Sim. Have you tried to do the wipe cache partition as suggested by Ann154. She is correct in saying that when an operating system is updated sometimes the remnants of the old operating system can remain causing the issues that you described. Please try wiping the cache partition and let us know if that helps you. Here is how:
• Turn off your device.
• Press Power, Volume Up and Home simultaneously
• Wait until the phone vibrates and then release Power and Home
• You should now see the recovery screen. Use the volume buttons to move and select Wipe Cache Partition.
• Press the Power button to confirm.
• Select Reboot System Now and again, hit Power to confirm.
• Wait until your Note 4 reboots.
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I have wiped system cache partition, but no improvement. Seems to be
getting worse. Frequent hangs and spontaneous reboots, boot loops and
occasional boot failure. Almost seems like a hardware error (internal ram
failure?) is at fault, but I don't understand why it would suddenly be
occurring (along with so many others), the hardware has not been damaged in
any way. I have backed up all my files in case the device stops functioning
As we have all mentioned, we have already wiped the system cache partition, and many, including myself have also done a hard reset and deleted everything. It is now crashing/rebooting 8-10 times per day. My phone is barely over a year old (bought brand new from Verizon August 2015). If this is how Samsung is forcing us into upgrade our devices, I am never buying a Samsung product again.....
I used to get 30+ day uptimes between reboots, smooth operation etc no
problem. Now I can barely compose one email without lengthy lags and soft
resets (eg when it hangs then jumps to the lock screen and requires
password entry to get back in). I checked developer options CPU usage and
no apps doing anything unusual - only system server and kswapd0 are most
active. What went wrong?
The_Sim, I am sorry to hear that you're still having ongoing issues with the device. We appreciate your efforts, including attempting wiping the cache partition. I know it can be quite annoying to experience issues after an update of your device. I would suggest completing a factory reset of your phone to wipe the software and start fresh. Click here for instructions: Factory Data Reset (Powered Off) - Samsung Galaxy Note 4 | Verizon Wireless
Please be sure to back your device up with Verizon Cloud before resetting, as all information will be deleted and need to be restored. Verizon Cloud | Verizon Wireless
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As we have all mentioned, we have all wiped the cache, and have done a factory hard reset, and it's still happening (it's getting worse). It seems like only the original poster is being acknowledged. Does everyone with the same problem need to start their own new post for Samsung to admit there is a problem?
I can't see this problem ever being fixed if there is no acknowledgement that there is indeed a software problem with the latest update...