Issues with Note 4 after software update

This issue is far from being solved. Here are 28 pages of people with the same issue with this phone which I am also experiencing and it is not related to battery and factory resets are not resolving it or clearing the cache.
https://forum.xda-developers.com/note-4/help/note-4-freezing-restarting-t3348821/page28

The temporary solution many have found is by using an application called Wake Lock in "PARTIAL_WAKE_LOCK" mode which causes increased battery drain but has stopped the freezing and random restarts. I have only experienced those issues since after the 5.1 update but have no idea what is causing it or why the wake lock seems to prevent the issues. Either AT&T or Samsung need to figure this out and correct the software glitch causing the problem or provide free replacements for the phone without locking into another 2 year contract for phones that are almost paid off after over 2 years on the Next program.

Hello there @Lucifuge752!

Thank you for providing detailed information on this issue. We always appreciate updated feedback from our users!

What’s great is since the Android 5.1 update, the Galaxy Note 4 has had several security patches released to the phone. The latest release was March 10, 2017, the version is 6.0.1 and is a recent security patch for the device. You can always get more information here. Select your make and model phone > View all Tutorials > System & Storage.

Please do not hesitate to return to this thread if you have any updated information. We will be sure to release any new data as well when we receive them.

Have a great rest of your weekend and take care! 

Shenoah, AT&T Community Specialist

I just received the MMB29M.N910AUCS2EPK4 update on 3/11/17.  My Note 4 has rebooted / restarted 6 times for no reason after this update. 

After the 4th time, I did the cache wipe.  It has rebooted / restarted 2 times since then. 

I am also experiencing a major slowdown in the display and it seems to hang when displaying the used apps, as if the system ran out of memory. 

Great, It just rebooted again as I am typing this message. 

Hello @Landwolf,

I’m sorry to hear you’re still having trouble with your Note 4 after completing a software update. It’s appreciated you came back to this thread in order to receive a solution. I’d be delighted to help out!

Another option available to you would be to complete a master reset on the phone instead of wiping the cache partition. The master reset will switch the phone back to factory settings; removing any personal information such as photos, apps, contacts, etc. Please be sure to back up first, so you can restore this important information later. Our Device Support page has step-by-step instructions on how to complete a back up and reset. Just be sure to select your make and model on the page.

You can also look into replacing your device via warranty if it is still covered. All phones come with a 1 year manufacturer warranty which covers issues such as software defects. If you’re not covered, you can contact Samsung to look into alternate replacement options.

I hope these options help out! Have a good day!

Shenoah, AT&T Community Specialist

I am having this exact issue now as well.  My phone is freezing and rebooting 4-8 times a day.  I've done a factory reset without luck.  I'm out of contract/warranty, so please don't tell me to go to Samsung, etc.  The phone was great before this update.  I have no desire to purchase another phone, and if I end up having to, I'm going to go elsewhere since as I've said, I'm already out of contract with AT&T and if your "help" is to tell me to contact Samsung, then I'll roll the dice and try give someone else my money.

This is clearly a problem with so many people having the issue, at the same time, after the same update.  You don't need any more evidence.

Hello @Trekkan,

I am sorry to hear you are also experiencing the software issue. I definitely want to ensure we use all of our troubleshooting options available to resolve your concerns.

In local Best Buy locations there are Samsung Experience booths where they can take a look at the phone, and if available, re-flash the update on your device. If you are on the most recent software update, they may not have the latest version available to flash onto the phone.

Please let me know if you have tried this option, and if you have noticed any positive results!

Shenoah, AT&T Community Specialist

My Note 4 was working perfectly fine before the lastest software update.  I did not need the update for whatever "security fix" it was suppose to "fix".  Why are these updates being forced instead of being optional?  There was nothing wrong with the phone before the update. 

What can replacing the phone do when all that will happen is that ATT will force the update, and break the phone again?

I went to do this today, but they didn't have anyone staffing the place on Tue/Wed, so I am going back again tomorrow to see if they can do anything.  The guys at the AT&T store couldn't help and were the first ones to recommend the Samgsung support at Best Buy.