[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] poor_red_neck:
Make sure you download the correct version depending on if you have 910T or 910T3.

Follow the steps in this thread for rooting and installing TWRP:

910T:

http://xdaforums.com/note-4-tmobile/general/easy-steps-stock-odin-n910tuvu1anih-cf-t2903733

910T3:

http://xdaforums.com/note-4-tmobile/general/easy-steps-n910t3-dofc-dog1-how-to-root-t3177225

MAKE A BACKUP OF YOUR CURRENT STOCK ROM WITH ROOT!!! Can not stress this enough. If you need to go back to stock, and you download an Odin file from a shady site, you have no idea what you're putting on your phone. It's sooo much easier to just backup your stock. Make sure ALL options are checked under backup. Save this file on your PC or external SD card just to be safe. I always keep a backup copy on my PC.

Put the ROM zip file on your phone, either internal or external SD card. Some recommend internal SD only, but I have had 0 issues flashing from an external SD card. I guess if you use a cheap card you may have issues, but if you have a name brand class 10 you should be fine.

Do a full wipe.... When you are in TWRP, choose wipe, then factory reset. Then goto advanced and check system and data and wipe again.

In TWRP choose install then navigate to the folder that has the ROM zip file... and install.

Do another factory reset wipe (do not wipe system this time, just goto the wipe screen, and default swipe is factory reset.

Boot your phone, and LEAVE IT ALONE. First boot will take a LONG time. 10 to 15 minutes sometimes. Once you get to the setup screen... LET IT SIT for another 5 or 1 0 minutes.

Complete your setup process as you normally would do. There will be a popup saying it needs to reboot to complete some actions. Go ahead and reboot.

Once everything is installed and working as it should you can continue on.

Keep in mind there are some mods that come pre-attached to the TEKXodus rom. To flash these, boot into recovery, goto Mount -> check SYSTEM. Goto Install, select "Up a folder" to get to the root folder, then goto System then Mods. There you can play around with different mods. The Note 5 screen off memo.apk will just need to be installed like you would a normal downloaded APK and is not flashed. You only flash the .zip files.

BEFORE YOU START MESSING WITH DPI settings (if that's your thing) make sure you do a backup first. Some DPI settings will cause force close on touchwiz, and you'll be stuck unless you use another launcher. Basically before you install Xposed, any Xposed module, or play around with the build.prop file make a backup first. Can NOT stress this enough. I'm constantly tweaking things, and will make a backup every 3 days just out of habit. Delete your previous backup after creating a new one as the files are quite large (5GB+ depending on what you have installed). ALWAYS keep your stock backup that you originally made.

I do not recommend using the TEKXodus Rom's Tweaks for changing DPI settings. This basically just edits the build.prop and makes a global DPI change. There are SEVERAL samsung apps that need to be changed back to 640 DPI (the stock setting) or they will force close. It is MUCH better to install the Xposed framework, and then install the "App Settings" module and change the DPI on a per app basis. Personally I changed "System UI" only (not android system) to 420DPI. This will give you a smaller notification bar but not mess with alot of the other apps. You can then change the DPI settings using App Settings on a per apk basis. Some I like at 420, some at 480, some even in the 300s. After changing a setting you will have to reboot to see the change. You used to be able to just kill the app and then re-open but that doesn't seem to work anymore.

If you DO decide to change the global DPI setting, MAKE SURE you install xposed and App Settings first, then read this thread to change all the nescessary apps back to 640 stock DPI or you will have issues.

http://xdaforums.com/note-4-tmobile/general/changing-note-4-dpi-settings-to-change-t2923408

If you need anything clarified let me know, typed this up in a bit of a rush at work.

Don't forget to hit that Thanks button if I helped :)