[Galaxy S6 Q&A, Help & Troubleshooting] 1sicgsr:
This is my first experience with rooting a phone and I think I messed up...big time! All I wanted to do was get rid of preloaded garbage on the phone to save battery life. Now I have a red message, "Custom Binary blocked by FRP lock".

My G920T was completely stock until today when I loaded CF_Auto_Root into it with Odin.

The phone immediately went into a boot loop after the install. I was able to boot into device recovery and did a factory reset at that point. I didn't know until after I reset to factory that I had accidentally installed Auto_Root for the G920F.

No problems here, booted back into initial setup, and I completed all of the setup items. Logged into Google, Samsung, etc. Because this was my first time and ended with a boot loop, I decided I'd just deal with the battery life problems. I turned off USB Debugging and the Bootloader modify option. The phone seemed to be working normally until I unplugged the phone from my computer, plugged it into wall fast charger, the rebooted the phone.

Now all I get is the Samsung home screen with the red message in the upper left corner. It will continually loop between the home screen and a black screen if the phone is plugged in. I cannot get back into the recovery menu as the phone is unresponsive to home + power + vol. up. I can however boot into the download menu.

I have tried reflashing the stock tar file, a stock bootloader, and stock modem with Odin 3.10.6 and 3.10.7. When I attempt the reflash I get the failed message in Odin, and "SW Rev. Check Fail. Device: 3. Binary: 2.

Are there any other options I have at this point, or something I'm doing wrong or incompletely?

Thanks

Edit:

I have fixed the phone after about 10 hours of messing around with stock firmwares, Odin, Smart Switch, Kies, etc. If the option was there, I tried it.

The FRP Lock is easily fixed by flashing in the stock firmware, but it must be the version the phone was at before rooting. This seems to be pretty common knowledge but my problem was I didn't know which version I had. I started with 0F6, that didn't work because I would then get "sw rev check fail device 3 binary 2" in the download screen and Odin would show a red fail almost immediately.

At this point I was getting pretty beat up by the phone and was trying anything I could find. I noticed, when entering the download menu before you press the vol. up button, that you can press the home key and the phone will show the barcode. This was the turning point for fixing my phone. It was in the barcode screen that I found my phone's S/N. Perhaps it is located other places, like behind the battery I can't remove, or on a carriers website (checked T-Mobile and didn't see it), but this is where I found it. I then remembered that Smart Switch had an option for 'Emergency software recovery and installation'. When you enter that menu the program asks you for your phone's model number, then the phones S/N. I could now use this option because I had the required info. I thought I was making progress but this method failed at 60% of downloading the software and drivers and an error in the download screen of "sw rev check fail device 3 binary 2".

The key for Smart Switch is, after you enter your model number and serial number, the program tells you what firmware version the phone was at. The 3 fields that pop up all read "OJC". More progress! The firmware version I was trying to install, which was the newest one I could find without knowing what to look for, was 0F6. I found the OJC .zip file at sammobile.com. It took 2 hours to download to 95% and the download failed. Restarted the download and waited 2 more hours.

While the OJC was downloading I was still messing with options I was reading about from google searches. I read multiple times to try different versions of Odin, try different USB ports, try different sequences of loading/connecting device to pc. I changed USB ports on the PC and the samsung drivers started installing for the device. A second driver installed this time for Samsung Modem 2 (I only particularly remember the Modem 2 part) that I didn't see install on the other USB port. At this point I decided to try Smart Switch again. This time, with the extra driver, the download completed to 100% and started to install some files onto the phone. But, it only got to 20% installed and erred again. This time the error was "sw rev check fail device 3 binary 1". I also noticed that the Current Binary field on the download screen changed from "custom" to "Samsung Official". More Progress. At this point there was nothing more I could do until the OJC was finished downloading.

As soon as I unzipped the OJC I opened Odin v3.10.7 and loaded the firmware into the AP, plugged in the phone, hit start. Red Fail. Then tried loading the firmware with Odin v3.10.6. Loaded OJC into the AP, connect device, hit start. Red Fail, but, I made it past the Nand Write Start and got all the way down to the system installation part before it failed. More Progress! Tried v3.10.7 again and didn't make it past Nand Write before it failed again. Then I started changing the order of when I opened Odin, loaded the firmware, and connected the device. There are tutorials everywhere that specifically say, "CONNECT IN THIS ORDER OR THE FLASH WONT WORK", I found this to not be entirely true.

How I eventually got the OJC firmware loaded back onto the phone was to Restart the phone into the Download screen, connect phone to pc and wait for Odin to recognize the device, then load OJC into the AP, hit start. In v3.10.7 the install failed every way I tried at different points in the install. v3.10.6 is the one that ended completely re-flashing the phone to stock OJC firmware.

If you're new, or stuck, make sure you do the following:

- Verify you are trying to load the correct firmware with smart switch. (OJC is the last 3 characters of the file names)

- Try different versions of Odin

- Try different orders of setup processes

- Try different USB ports and MAKE SURE you have all Samsung device drivers installed