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[Q] Bricked phone, need help unbricking. (System software not authorized....etc.)

So, I've done this before, and I've never bricked a device until now.
I tried installing a custom rom for my Galaxy S3 on Verizon, but when I restarted, it says this:
System software not authorized by Verizon Wireless has been found on your phone. Please turn off your phone and go to the nearest Verizon Wireless store for help.
I can't get into clockwork, or any bootloader. Any attempt to do anything brings this screen up.
Now, I can get into the Odin downloader. (Power, volume down and home). But, I can't figure out how to get a Rom to load. This is where I am stuck. I have downloaded a few roms, all stock, but none of them want to be recognized. I have no idea where to go. I've been downloading stuff for 5 hrs and nothing has worked, so now Im going to the forumns. Any help is appreciated.
I have the Verizon i-535 Galaxy SIII.

You did not brick your phone you failed to unlock your bootloader. There are 2 guides in the android dev section for rooting.

http://forum.xda-developers.com/showthread.php?t=1974114

Odin back to stock and next time after rooting make sure to use EZUnlock 1.2 to unlock the bootloader BEFORE loading a ROM

[q] need immediate help sch r530u!!!!

Hello everyone new and I just really found out about xda and have a major problem ok I have us cellular sch r530u s3 and I rooted then I unrooted to get kitkat update...so once I unrooted I lost root but rooted Alps that I use are still usable like root explorer and adaway and when I try to get ota it says sorry device modified so I went and got root checker and it says device doesnt have root access..so I went and got odin 3.07 and flashed some kind of recovery called cf autoroot d2usc schr530u tar well anyway now I cannot boot into any recovery and when I try to the samsung logo comes up but it turns red then screen fades to black and nothing happens....so as of right now I am begging for help to unroot fully and restore stock recovery and be able to ota kitkat...also I've been trying to find the firmware official for this model and no luck I dont know what is wrong but im so stressed trying to figure it out...someone please help!!! Greatly appreciated!!!! Thanks!!!!

[Completed] need help with odin tmobile samsung galaxy s4 m919.

Ok so I'm trying to unroot my s4 through odin using the 2nd one from the list of firmware for my s4 from sam mobile dot come cause the first one came out corrupted i believe
I flashed it through odin and it passed! But it still stuck on the tmobile bootloader screen and i have no idea how to get out of this. EVEN when i try to go to safe mode no matter at what time or order i press on the physical buttons of my phone, i still go to the green android screen where its as if you were trying to flash another rom. I need hellllllppp.. maybe i need to flash the latest firmware? this one is old form 2014 but the first one like i mentioned came out corrupted which is from 2015! thx

Hi
Thank you for using XDA Assist.
Here is a thread that explains how to return to stock: http://forum.xda-developers.com/showthread.php?t=2258628
And the following thread is a guide to perform several tasks like unrooting your device: http://forum.xda-developers.com/showthread.php?t=2335109
Good luck

[Completed] Softbricked Samsung galaxy S2X Andriod 4.1.2

I was installing Cyangenmod couple of months ago and i kinda messed up and my phone got softbricked and i didnt know what to do and the cell phone repair shop said he will charge $100 to fix it but i heard you can fix it for free i saw the post for the same problem but that phone had andriod 2.3 So can someone help me in un softbricking my phone and i dont have the backup files on my SD card do i tried looking for the andriod 4.1.2 rom but i couldnt find it so any help will be amazing

Hello,
Welcome to XDA.
Can you still boot to recovery? If so you can try the normal wipes in recovery and reboot, you can restore a nandroid backup if you ever made one, you can download another custom ROM for your model and try flashing it.
If none of that works and you can boot to download mode, you can flash the stock firmware, most Samsung firmwares are available at Sammobile.com and at samsung-updates.com, you will have to use your exact model number(located behind the battery), get the firmware for your exact model, it doesn't have to be 4.1.2, any firmware version will work as long as it is for your exact model number, it cannot be for another model number. If you want to root after restoring the stock firmware then you need to check if the firmware you find is rootable before you flash it, some are not rootable depending on your device.
When I search your model number on XDA, it comes up that your device is compatible with the T-Mobile custom ROMs, see if you can find one for download that doesn't have a dead link and flash it through recovery if you can get to recovery, dont forget ot get the right gapps to go with the ROM you find if you decide to go that route. The ROMs can be found in the forum linked below.
http://forum.xda-developers.com/galaxy-s2-tmobile/development
If you have trouble finding what you are looking for, try posting your question in the forum linked below.
http://forum.xda-developers.com/android/help
The experts there may be able to help. Good luck.

thanks
i looked through the sites and i found out one of my friends goes here so he fixed it for me

[Completed] tmobile sgh-t999 s3 wont boot completely

I have a t-mobile s3 that was at one time rooted then updated to the latest firmware root was lost and never rerooted. I was running the latest update totally stock no modifications. The phone wont complete the boot it just hangs at the end where the samsung is going from blue to white. The phone will go into download mode and recovery however when i tried to do a factory reset on it it failed. The device is not rooted so i cant flash a rom to it. I dont know how to fix it. I dont know what version of odin to use and am not sure what rom to put on it or if i can even do it. I connected the phone to odin and it said s4 mini so I am thinking that is not the version of odin to even try and flash the stock firmware. any suggestions on how to fix my phone or if it can be fixed?

Hello,
Welcome to XDA.
I cant post a link for you but you can go to Sammobile or samsung-updates and use your model number to find your stock firmware. I'm sure there will be more than one android version for your device so choose whichever you want, just be mindful of which ones are rootable or not if you want to root it again at some point. Then use at least Odin version 3.09 or newer, make sure you have the newest version of "USB drivers for Samsung phones" installed.
If you have more questions or need further assistance you can post your question in the forum linked below.
http://forum.xda-developers.com/galaxy-s3-t-mobile/help
The experts there may be able to help, good luck.