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For those of you with AT&T Galaxy Note 3 SM-N900A, now there’s finally a root method available.
This root method will erase everything on your phone so MAKE A BACKUP before proceeding!!!
UPDATE: AT&T has updated software and this root method will not work unless you have N900AUCUBMI9 build number!!! (Settings->About Device->Build Number)
Remove all your microSD cards beforehand!!!
Step 1. Power off your Note 3. Then hold down Volume Down, Center Home, and Power buttons for about 5 seconds until you see warning screen.
Step 2. Hit Volume Up key to enter ODIN Download mode and connect a micro-USB cable from your AT&T Note 3 to your computer.
Step 3. Download and unzip the Root_de_la_Vega.7z:
Step 4. Run N900AUCUBMI1_OneClickBin.exe and click Start.
If you do not see a yellow-highlighted box, you need to download and install Samsung USB drivers. Then unplug and re-plug the micro-USB cable, you should now see it.
Step 5. Your AT&T Note 3 should reboot when it is done and you will see “PASS!”. If you see “FAIL!” or any other error, you can try re-running the program and try a different USB cable/port.
What is a Custom ROM?
A custom ROM is a custom, modified operating system that you can install on your Android device. Basically it's like installing Windows OS on a Macbook. By installing a custom ROM, you can bypass stock factory settings like locked hotspot tether, install new Android versions early, or even convert your phone into another OS.
With a custom ROM, you can really maximize the capabilities of your smartphone by adding custom features that have been developed by open source developers.
How to Install Custom ROMs
First, you will need to root your device, if it is not rooted yet, follow our root tutorial and root your phone.
Once rooted, you should have TWRP installed on your phone. Installation of a custom ROM is easy if you learn the basic of it. If you don't know how to install custom ROMs using TWRP recovery, see our tutorial on How to Install Custom ROM using TWRP!