Hi,
Too late. The update took place and oh my God am I having problems. My earpiece volume is now so loud that I have it turned down to maybe 10% loudness and it is still too loud. My battery life went from 77% to 31% in 45 minutes with nothing physically open or running and the phone is very warm. I also have Evernote, VR Ware, and some other junk that this NK3 update forced into my Note 4 without my permission.
I just spent over 2 hours on the phone with AT&T and Samsung and they blamed each other and I'm left hanging with a ruined phone now. AT&T offered me a refurbished phone, Samsung said "Can't help you" !!! Rot in hell Samsung and NO thank you AT&T for a used device after I just gave you $850 two months ago for a brand NEW device.....
BTW....Samsung said that a firmware update cannot be blocked