Samsung finally rolled out the Android 4.4.2 KitKat update to several variants of Galaxy Note 3, it was first released in Europe and Russia before eventually spreading to India, South Korea and Switzerland. However, as usual, the U.S. variants of Note 3 such as the AT&T variant (SM-N900A), have to wait a little longer, due to waiting for carrier approval before mass release.
But if you cannot wait to try the KitKat running on your phone, you can try to flash a leaked Android 4.4.2 firmware with software version N900AUCECMLG, which is likely similar to the official release. This leaked firmware contains new bootloaders, so it will hard to get root on the AT&T Galaxy Note 3 after flashing the KitKat firmware, since there are no working exploits for this leaked firmware.
Fortunately, we have a talented developer like drakeymcmb from xda, who set aside his free time to build a custom pre-rooted Knoxraid KitKat ROM for the AT&T Galaxy Note 3 (SM-N900A). This ROM based on leaked firmware (Build: N900AUCECMLG), so similar to the leaked one, just added a few features like App2SD, debloated, zipalignes, init.d support and much more.
- A Samsung OEM USB cable for stable connection.
- Since it involves Odin, so we need a Windows computer and Note 3 USB driver.
- An AT&T Note 3 (SM-N900A) running rooted Android 4.3 Jelly Bean (MJ5 software version). If you are already flashing the leaked KitKat, the dev encourages you to back to MJ5 firmware and installing Safestrap.
- Download the Knoxraid KitKat ROM from the dev’s thread here on xda.
AT&T Galaxy Note 3 Android 4.4.2 KitKat Root by flashing Knoxraid ROM
- Unzip the ROM package that you’ve downloaded before (Step 4), locate a file named “KNOXRAIDKITKAT.zip” then move it into your internal SDcard.
- Boot into Safetrap recovery, then wipe system and data partition, just like when you are flashing the other ROM.
- Remember to flash the Knoxraid to stock slot, wait, don’t reboot even if you get an option to reboot.
- Open the back cover, then pull out the battery, put the battery back then close the back cover.
- Now we need to enter into Download mode, press and hold “Vol Down + Home + Power button” until you see warning message and go to Download mode.
- Open Odin on your computer, then add four flashable files from “Flash in Odin” folder (BL_N900AUCECMLG.tar, AP_N900AUCECMLG.tar, CP_N900AUCECMLG.tar and HLTE_USA_ATT_32G.pit).
- Hit Start to begin the flashing process, once done and rebooting, your AT&T Galaxy Note 3 running Android 4.4.2 KitKat should have root now. This guides are subject to change, so make sure to follow the dev’s thread here.