Alrighteee,72 hrs w/o root was about all I could stand:
An alternative is available & from reports,does not bootloop during phone calls:
http://forum.xda-developers.com/note5/development/arter97-kernel-galaxy-note-5-t3189907
I deviated a bit from the developers recommendation of using PhilzTouch Recovery & used TWRP 2.8.7.1 Alpha for SM- N920
The directions are in the thread,but,I'll post a quick how-to,however,grab the downloads from the links in the thread:
1) Download the kernel & SuperSU to your phone.Anywhere is OK,it'll show up in TWRP.
2) Install Odin 3.10.7 on your desktop PC.
3) Download TWRP-2.8.7.1-Alpha_N920T.tar.md5 to your desktop & move it to Odin.
4) Boot phone into download mode,plug into PC & Flash TWRP in Odin,phone will reboot,unplug phone from PC.
5) Reboot to TWRP:
At this point,it is
STRONGLY URGED that you make a full backup.For added insurance,make an additional copy of this backup once were done here & place it in a safe spot,such as your desktop,USB Dongle,wherever.
Now,while still in TWRP recovery,install both kernel & SuperSU,reboot phone
(YOU MUST FLASH BOTH AT THIS TIME,OR YOU WILL GET INTO A BOOTLOOP).
If by some chance you make a mistake & only flash SuperSU (which WILL bootloop),don't panic,just boot back into recovery,flash the kernel & you'll be OK.
Profit,you now have root.
After a day or two of use,I'll report back,hopefully no reboots during calls (or anytime,for that matter).
Also,the developer recommended the PhilzTouch recovery apparently as a precaution,as he had no way of testing/verifying w/TWRP.
But,someone had to try (at least one other person did over @XDA,I believe).
It's all part of the fun.
One final note:
Rooting your NOTE5 technically voids any Samsung warranties,you proceed at you own risk,no one here is responsible for voided warranties/bricked phones,or otherwise.
Another note:
Flashing this kernel doesn't just give you root,it totally removes KNOX from your phone,hence the strong urging to perform a TWRP NANDROID Backup before flashing the Arter97 kernel & SuperSU.
Give me a day or two of use & if all is well,I hope to see others jump in.