I just received a refurbished S3, with KitKat already installed. I also used CF-Autoroot through Odin. Odin said everything passed. No su was installed, can't boot into any recovery, and rootchecker claims I am not rooted. If I install SU from play store, it says something about binaries needing updated, and that it can't do it. I even flashed it again, and it passed, but got all the same results. What am I missing?
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I just remembered something that you might try. As Rode Warrior mentioned, flash the latest Philz recovery via ODIN.
However, in ODIN,
uncheck the "Auto Reboot" box and remove the battery cover (keep reading, you'll see why). Now, in ODIN flash the recovery, but when it says
PASS, your phone will not reboot.
At this point, remove the USB chord and unplug the battery. Now, hold the
Power + Vol Up + Home Button all together and re-insert the battery.
You should now boot into recovery. I can't remember the exact technicalities behind it, but Samsung built into their recovery a feature that will override the recovery you flashed in ODIN with the stock recovery.
Try the method I just gave you and let me know if it works.