[Verizon Galaxy Note 4 Android Development] kevintm78:
Bootloader Upgrade

If anyone is interested in updating your bootloader you can follow these steps to do so. I've only just completed it myself and so far there aren't any immediate benefits and there may not be any at all but it is doable. You will lose everything on your internal SD card and it's the same process as before so you'll need that spare SD card that will have to be formatted afterwards. Most of these instructions are from [MENTION=1138767]civichater[/MENTION] but I'm going to modify then slightly just for efficiency sake.

You'll need to download the hybrid firmware and unlock script here. Also you can get a copy of TWRP there or the more recent version that I linked to in the 2nd post of this tread. Then download the CQI2 aboot and the CQI2 modem from here. Then download Kingroot here. Last but not least, you'll want to have whichever rom you'd like to run on another SD card or if you're using the most recent TWRP you can transfer straight from your pc onto the internal SD card while booted into recovery once we're to that point.

So that's:

-hybrid firmware

-samsung_unlock_n4-fix

-CQI2 aboot

-CQI2 modem

-Twrp

-kingroot

-rom

-(almost forgot) SIM Card ie working service

1. Power down, pull the battery for 3 seconds, then boot into Download Mode

2. Using Odin, flash the BPA1\CPD1 hybrid firmware

3. Once that's done flashing reboot to recovery and factory reset. Then reboot and let that firmware install

4. Once you've gotten past all the setup part you'll want to power off again and boot to download mode again

5. Using Odin, flash the CQI2 aboot and then reboot. From this point on the process is the same as before.

6. Enable developer options, turn on USB debugging and turn on "allow unknown sources" in the security settings.

7. At this point, you'll want to have your spare SD card in and go ahead and open a command window from the same location that you have the samsung_unlock_n4-fix file in. In my case it was in my download folder and the easiest way to do that is to open that window, hold down the shift button, then right click. You should see an option that says "open command window here" then click that to open.

8. Once you open the terminal enter this command: adb devices

9. Then this command: adb push samsung_unlock_n4-fix /data/local/tmp/

10. Then install kingroot and let it start rooting. Be sure to keep the terminal open and your phone connected.

11. Once kingroot starts the rooting process do not let the phone go to sleep. Just keep a finger on the screen.

12. When kingroot gets past 50 -60 percent, enter this command in the terminal: adb shell

13. If you enter adb shell and it gives an error or says your offline, just unplug the Usb from your phone and plug it right back in. Then enter the adb shell command

14. As soon as kingroot says you're rooted, enter this command in the terminal: su (You have to grant root permission on the phone and continue)

15. Then this command: cd /data/local/tmp/

16. Then this command: chmod 777 samsung_unlock_n4-fix

17. Then this command: ./samsung_unlock_n4-fix

18. Once the scripts starts it will ask you if you want to continue, just type out: yes

Then it will do it's thing, back up your bootloader, and then power your phone down when it's done.

19. Once powered down, PULL OUT YOUR SD CARD, and boot back into Download Mode

20. Using Odin, flash Twrp and immediately boot into recovery when Odin reboots your phone.

21. From this point you just flash your favorite rom, power back down, boot into Download Mode, flash the CQI2 modem with Odin and reboot.

22. Once everything loads back up you're back in business.

I realize it looks like a lot of steps but it really only took about 25 minutes to get through. The real pain is just setting up your rom again and moving all your files around that you want to keep. Most of the steps I added just to try to make things as clear as possible but that being said it may not be worth the trouble anyway. I mostly was trying to see if it could be done and if it could be made easier somehow but ultimately it looks as though that's about as easy as it gets.