[AT&T Samsung Galaxy Note 4] cswackha:
Hi there, I have a locked AT&T Samsung Galaxy Note 4 Edge (SM-N915A) that is experiencing issues after the Marshmallow upgrade (6.0.1). I have had the following issues:

--> phone freezes (will not wake after wallet is closed and then opened);

--> the phone will randomly re-boot;

--> if phone is awake, the response times have been very slow;

--> Issue seems to occur more often when charging

The only method to remedy the issue is to remove the battery and then power back on. I have wiped cache and factory reset the unit but still experience the same issues. I went to Samsung desk at Best Buy and they re-flashed the operating system but this did not fix the issue. I finally narrowed down the issue to the Samsung Gear application (I have the new Frontier Gear S3). When this application is not running the issue seems to disappear (although still testing). I am attempting to pinpoint whether NumberSync is causing the issue or the application itself. Has anyone else experienced this issue?

Update: while writing this email, my unit just re-booted when I woke it up :mad:

Any suggestions would be greatly appreciated....

Update to issue...

I attempted another factory reset. Again, once I installed the Samsung Gear application and proceeded to setup my Gear S3 wearable, the phone started to "act up". Details on setting up Frontier Gear S3...

--> Downloaded/Installed Samsung Gear application

--> Used "Connect to New Phone" to setup Gear S3

--> Setup and Activated NumberSync

After this process, phone response time was sluggish and then froze. I pulled the battery, and then uninstalled the Samsung Gear application, and the phone seemed to recover. After some careful thought, I performed a complete

factory reset

on my Gear S3 wearable (in lieu of using "Connect New Phone"), then, I re-installed the Samsung Gear application. The phone seemed to be functioning as normal. I proceeded to setup NumberSync and again, the phone was still functioning as normal for most of the day. In the evening, I setup the wearable (added back watch faces, setup S Health, added localized weather and setup notifications). The phone still seemed to be fine. I plugged the phone in to charge (fast charge) and left the phone alone. Came back several hours later and the phone had froze. I concluded that my issue is directly related to the Samsung Gear application although I am continuing to test.

UPDATE 4/5/2017 - After experiencing 2 weeks of freezing, slow response times, removing the battery, numerous re-boots and factory resets my phone finally died (would not power on). I finally succumbed to calling Samsung Customer Care. I sent my Note 4 in for servicing on March 29th. Here is the response: Problem found: NO POWER UP - IF/CHARGING PORT - FWT - LOW BATTERY (STBY) Solution: REPLACED PBA - REPLACED COMPONENT. I think this means they changed out the motherboard and also replaced my battery. My Note 4 is performing flawlessly thus far. The only issue I have is the timing of all of this....I started having problems directly after the Marshmallow (AT&T 6.0.1) upgrade. My wife and son have the same phone, bought at the same time, and are also having issues but not as profound as mine.