When, oh when, oh when is samsung ever going to release the 5.1.1 update for the UK Note 4- 910F??
Also the fix for Stagefright..
Android and Samsung are absolute crap at updating their software and phones.
Why are there so many versions of each phone?? I don't like apple at all, but have to admit their one phone and universal distribution of same updates at nigh on same time, is far superior to android.
The 5.1.1. for the US Note 4 is terrible! I have received the update and have many issues now as do other fellow Note 4 owners. I wouldn't be in a hurry to get it, if it's not too late. 
The phone freezes, locks up, I lost some contacts, get the black screen of death, etc. I hope you don't experience this.
I checked for updates on phone, not really expecting them- its been so long waiting. Phone had got nearly 3/4 of download before I got back to phone, so let it do its thing.
UK O2 Note 4 just received 5.1.1
Will see what happens now.