Give it a rest. I know a lot of users want the latest and greatest operating system but before you moan anymore, maybe take a economics/business class or two. If you're a manufacturer, you are not going to spend millions of dollars developing and testing an update for a two year old device especially when a new (Note 5) model is on the market and a newer (Note 6) is on the horizon. I agree with updates to fine tune an existing OS but it's not good economics to keep looking backward to go forward!
I would wager that the vast majority of Note 4 users have never used all the functions on their current device but are complaining about no update.
I know some people's jaws are tight right now but get over it. Savour the beauty that is the Note 4. Save your nickels & dimes and buy a Note 6 this fall.
OK, I'm off my soap box.
By the way, I am on Verizon
The Fatyank