Note # soft bricked need help please!!

[alisha777]

I bought a note 3 off of ebay. It came rooted with a custom os. I tried to unroot it using the unroot feature on SuperSU and now it refuses to boot up. I get past the samsung screen and then the at&t circle starts and never finishes. I believe I should try and reinstall the old firmware to fix the problem. But since it has Android 6 on it i dont know if I should try android 4.4.4 or what I should do.

 

[audit13]

Did you confirm the model # in download mode? Do you see anything about Knox or warranty but on the download screen?

 

[llDJ4LIFEll]

Download Samsung Kies onto your PC

Open the software

Go to "Tools" at the top

Click "Firmware upgrade and initialization"

Enter your model number (can be found underneath the battery. Then click OK

Enter your serial number (also under battery)

Click OK

Then follow the onscreen instructions