Odin fail auth ошибка

Ok, so after a long couple of months of doing research and using a SPH-L720 and a GT-P3113 as «Lab Rats», I’m starting to understand how rooting works and how to do it. I do have a small update on the state of the tablet, and I have reasoning to believe the frozen at&t logo is the result of hardware failure.

My neighbor, who works at home with androids, managed to download the update and flash it successfully, via stock recovery, and told me that it would still freeze on the AT&T logo. He explained how it could be a hardware problem because the update flashed WITHOUT ISSUE, and still gave the same result. So, I need to take it to Best Buy or AT&T to have it fixed, i’m hoping they just replace it.

After doing more research, people were saying on different forums how the «All-In-One» firmware files have a slim chance of flashing successfully, and that «Multi-File» firmware files almost always work. But, knowing that the bootloader on this thing is locked (for some dumb reason that i’ll never understand), even if I did manage to find the 4 file firmware for this tablet, it would probably still fail.

I have, however, successfully rooted the other 2 devices mentioned above. I keep copies of stock firmwares, custom recoveries, and flashable .ZIP files on my hard drive. I do still have the OTA update for the SM-T337A on my hard drive as well, but I do kinda think it is the result of hardware failure.

It doesn’t make sense to me how KingRoot could cause a hardware failure. But then again, I never rooted any android at that time, or modified any android software. But, on the other hand, I still think it’s a software problem. The logic of AT&T to provide the stock firmware on the internet but, the bootloader is locked, what the actual «flip» were they thinking? Uploading a stock rom, meant for downgrading your device if problems are caused by new updates, but locking the bootloader up so tight, that we cant even do what the stock rom was intended to do, there’s no point in uploading the stock rom in the first place. And maybe if AT&T had the IQ of a tree instead of a newborn baby, they would upload the updated firmware like they did the stock rom.

I don’t wanna try to do the same with my SM-G850A, i’m probably gonna get the same outcome, plus, no developers are working on root methods or custom recoveries for this device, I guess i’m in stuck the deep end right now.

I recently installed a few new ROMs on my Samsung Galaxy S4 and, foolishly, did not make a backup of my stock ROM.  I found that all of the ROMs I used (CyanogenMod, SlimKat, and OmniROM) would not let my phone use 4G LTE service and I ended up having a lot of problems with even 3G service.  So I decided to re-flash my S4 with the stock ROM, a process I thought would have been trivial.  Instead, I found that going back to the old stock ROM wasn’t as easy as I thought and I struggled to find answers to some of the error messages I was seeing.  The two that caused the most headache were the “FAIL (auth)” error and the “SW REV CHECK FAIL” error.

These errors indicate that the phone cannot use the ROM provided (via Samsung’s ODIN loader) because the ROM is either not legitimate or is a version prior to the one currently installed.  Basically, if you’ve flashed a ROM that is Android 4.4.2 (KitKat), you will not be able to revert back to an earlier version (such as Android 4.2.2).  The solution is the find the authentic ROM for the same version you’re already at.  In my case, I needed KitKat and wanted the official stock ROM.

The only place to get the stock ROM is from http://www.sammobile.com/firmwares/ and they do require you to register as a member for free (well worth it).  Once you’re there, enter your phone’s model number (you can find this in your phone’s status settings) and download both ODIN and the firmware (usually around 1-2GB in size).

Once downloaded, load up ODIN, unzip the ZIP of the ROM they gave you, click PDA in ODIN and select the extracted TAR ROM file.  Place your phone in “download mode” (if you’re not sure how to do this, watch this video: http://www.youtube.com/watch?v=9qh4z4JWLpI) and ODIN should show there is a new device and will give it a COM number.  Click start and you should be on your way to having a stock phone again!