This method uses a modified version of the official NJ5 OTA to update and "Keep Root." The file is flashed in Safestrap and the end result is a 100% Stock, Rooted, NJ5 Device. However you must be 100% Stock NC2 (except for root and Safestrap) before proceeding.
**You can Odin back to NC2 after taking the NJ5 update if you decide to do so**
1. Place the
N900A_NC2-NJ5-KeepRoot_OTA.zip in the root of your ext sdcard.
2. Boot into
Safestrap recovery but
Do Not Wipe!
3. Flash the
N900A_NC2-NJ5-KeepRoot_OTA.zip in the "Stock Slot." Once flashing is complete press "Home" and reboot into "Download Mode".
4. Last, flash the
N900A_NJ5_Stock_Kernel in Odin's PDA slot(AP in
Odin v3.09+).
Once complete the phone will reboot then "optimize apps" before completely rebooting.
Done!
Notes:
1. Neither User Data nor your Knox Warranty Flag will be affected using this method.
2.
Should the update fail consider flashing back to factory stock NC2 using the files in the following thread then rooting and installing Safestrap: http://forum.xda-developers.com/note-3-att/general/n900aucucnc2-odin-files-t2838117
Known Issues:
1.
Safestrap will not function after updating to NJ5 4.4.4.
Alternative Custom ROM Method:
Here they are: (If you don't know the difference between each ROM please use the search function!)
N900A_NJ5_100%_Stock_Rooted_ROM.zip
N900A_NJ5_Stock_Deodexed_Rooted_ROM.zip
1. Use Safestrap's "
Backup" function to backup your User Data.
2. Place the ROM onto your ext-sdcard.
3. Reboot into Safestrap recovery then perform an "
Advanced Wipe" and wipe everything but your ext-sdcard.
4. Flash the ROM using the "
Stock Slot."
5. Once complete press "
Home" then "
Restore" and restore User Data.
6. Next press "
Reboot" and reboot into "
Download Mode."
7. Flash the
N900A_NJ5_Stock_Kernel.tar.md5 in Odin's PDA slot(AP in
Odin v3.09+).
Done!
Thanks to
@carl1961 for sharing his nandroid backups used to create the ROM's!
Notes:
1. This Custom ROM process will update your Modem, Non-hlos, System, Kernel, Stock Recovery, and Bootloader to NJ5.
2. Follow all of the above steps in the order provided and do not skip any steps or you may experience issues with your device!
3.
Safestrap will not function after updating to NJ5 4.4.4