1. Flash stock rom using Odin 10.7. https://www.sammobile.com/firmwares/...FBTU1DPE1_BTU/
(IMPORTANT) Do not let it boot up til it says drk fail, hold down the vol down, power, and home button to get back into the Download mode.


2. Flash PhilZ recovery using Odin 10.7
https://forum.xda-developers.com/dev...6498#downloads


Once it's done, hold vol up, power, and home button to get back into the Recovery mode immediately.
I'd personally do a wipe to make sure nothing goes wrong, then backup the EFS and other partitions while I'm at it.

3.Then choose Reboot to go back into the Download mode.

4. Now flash CF-Auto-Roots using Odin.(N910FXXUDPD3 6.0.1)
https://download.chainfire.eu/568/CF...xx-smn910f.zip

5. Let it do the installation on the phone. It will reboot a few times I think, and hopefully when it says Pass, the LED indicator starts glowing. Then it should be all good.