[Q] Unlocked tab now locked? - Galaxy Tab 10.1 Q&A, Help & Troubleshooting

Hi,
My 32G retail galaxy tab was unlocked when I purchased it. It was already at 3.1. I had the 'unlocked lock' symbol during boot and the nvflash method to root worked perfectly.
Today, I downloaded and installed a small (11MB) OTA update; something about adding Google Videos support. After the flashing progress bar, it showed some sort of console log on the boot screen (the one that says Galaxy Tab 10.1), then rebooted again. Since then, my tab appears to have a locked bootloader. The 'unlocked' symbol is gone from the boot screen and my attempts to root using nvflash fails. I know I can root using the other approach, but I was wondering if anybody else has seen this - an unlocked tab turning locked after this OTA update?
/vv

There seems to be more discussion of this here: http://forum.xda-developers.com/showthread.php?t=1196125 so it looks like you are not alone with it.

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[Q] Atrix 4G Help- Stuck on the Goapk Logo while loading CUSTOM ROM

So, I managed to brick my Atrix 4G. It was originally running on Gingerbread 2.3.6, but I wanted the 4.0, so I set about rooting it and everything, which, as you can see, backfired.
What I did was:
1. Root it using the pre-install method (No "One-Click"- I actually tried that method, but it didn't work for me; thus, I had to go about doing it manually)
2. Unlocked the Bootloader.
3. Tried to install ClockWorkMod Recovery.
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Also, I was wondering if my phone's really rooted? because, after unlocking my Bootloader, my Superuser app's icon disappeared. The ROM manager wouldn't even work. I would get an error stating that "An error occurred while attempting to run privileged command," but I went ahead anyway, using the "Press vol. button while switching on..." method. I then cleared every single thing- i.e. factory reset, clear cached, etc. Then, I tried loading the zipped custom ROM file on my SD card; everything looked fine, as if the files were correctly uploading- at last, it even said the whole process was done. But, switching on, and waiting and waiting led me to nowhere.
Today, I re-installed the stock 2.3.4, but I wanted a 2.3.6, so I did a software update, but now my phone is stuck on the goapk logo screen. I read somewhere that this is because the Bootloader is unlocked.
HOW DO I GO BACK? D:

[Q] Dark Bootloader with S-On. Options?

I have an AT&T HTC One I bought off swappa. It was fully converted to the Google Play Edition. About a week ago I clicked install update when it popped up (dumb probably). It rebooted and showed a "no command" screen with a keeled over android guy with his stomach open and a caution sign there.
I took it to Seattle Android Guy who tried to get it all stock by locking the bootloader and turning s-on, but it wouldn't take it because the bootloader was still the dark bootloader. I took it back home and managed to get TWRP Recovery on it, but it won't take any of the roms I try to flash over to it or install via TWRP. I am pretty new to everything so if you have a solution, the more detailed the better. I've read that it's possible it is bricked, but I really want to keep looking for a solution. I paid almost $400 for this device and only got a couple weeks use out of it. Any suggestions, ideas, or help would be greatly appreciated.
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Help With Nexus 7 (2012) Bootloop Issue :(

Hi, The other day my Nexus 7's battery went, I put it on charge and when I switched it back on it was stuck on the Google splash screen. I left it quite a while till I tried to turn it off. It wouldn't turn off. I then found out how to get to the bootloader screen & tried various things there, But nothing worked. It's still stuck on the Google screen.
I then found out about the Wugs toolkit. I followed the instructions there but my Nexus won't unlock. I did the 'Flash Stock + Unroot' anyway, It didn't work (I think because the bootloader is locked)
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One Plus 5 Bootloop [Help]

So I've been using magisk recently and today I received a notification prompting me to wanting to update to the latest version of Android OS for my One Plus 5, so I decided that the best course of action was to backup all of my important data and the delete the magisk software using their uninstall.zip file. Afterwards since I knew the device would be unrooted I placed the phone into fastboot and used ADB to re lock my bootloader which was in turn successful up until the point where I rebooted the phone and it had a text that read along the lines of "Your device is not trusted therefore it will not boot" so in response I decided to simply unlock the bootloader once again and in doing so my phone rebooted once again but it has gotten stuck in a bootloop. Any help would be appreciated and a thanks is in advance.
SOLVED.

Samsung Galaxy Tab S6 Lite (LTE) Bricked? Bootloop HELP

Hello, I am new here and I made a huge mistake!
I purchased Samsung Galaxy Tab S6 Lite (LTE) literarally 1-2 days ago and I wanted to root it, I had my smart phone rooted which did not have Knox protections, it was as straight forward as flashing TWRP and use Magisk via instructions I followed.
I make use of "Root" privileges a lot when using my device, I find it very important to my daily life so I decided to risk rooting it, after doing so my tablet was showing 2 errors, that its not using official samsung software and that the boot loader is unlocked, when I unlocked the boot loader using OEM Unlock everything went fine, the option was greyed out and checked afterwards.
During the boot process, it reboots 2 times and it shows a integrity error, integrity and some very long number, I am assuming its a integrity check? I have the exact matching firmware, so I flashed back the stock firmware and... the "not using official samsung software" warning disappeared, it boots me into recovery mode, I choose "reboot" and the device goes to boot looping with the same error.
I was following this tutorial: https://forum.xda-developers.com/galaxy-tab-s6-lite/how-to/howto-unlock-root-galaxy-tab-s6-lite-t4132289
But there are some things I skipped, here the exact steps I took:
Unlocking Boot Loader:
Followed all the steps from 1 to 4 but I skipped the 5th step entirely, the step where it asks you to mess with firmware date and twrp, I did none of that, I will mention that when I was looking for stock firmware to download before doing anything, I was not able to understand the CSC so I didn't know which firmware to exactly use until a software update came up which told me the exact firmware, I accepted the update and download that stock firmware, because my firmware was updated I didn't think that following the few steps of the step 5 would've done everything as I was already off the path.
I didn't do the 6th step as I just checked of the OEM Unlock is greyed out and still checked in the "developer options" section, I assumed that it was a success, not to mention the boot loader unlocked warning that was showing up and yes, all the data was erased and was forced to go through the setup process again as expected.
Root the tablet:
1. I have downloaded the firmware as it says not just for the purpose of rooting, the firmware that the software update told me about, this is the firmware I downloaded, the firmware is a exact match, everything is matching: https://samfrew.com/download/Galaxy__Tab__S6__Lite__-LTE-__/xs5l/SEB/P615XXU3BTI3/P615OXM3BTI3/
2. I follow all the steps from 2 to 11 from here.
3. When I reached step 12, I went to download mode and I look for any messages regarding it only allowing for official samsung images, but I saw no such message, didn't really pay attention to anything else, I just glossed over things, considering there was no such message I assumed that KG/RMM state was good, don't know what it was but it might not have been "prenormal" because there was no message regarding official samsung images, from here I falshed the boot.tar file like in the instructions, that lead me to my current problem I mentioned at the very start of this post.
4. There was no step 13 as I can't boot into android due to "integrity" error I have, right now I have my tablet turned off (thank god I can do that) via the recovery that shows up after flashing stock firmware.
Addition Info:
1. I don't have any data to lose, if I need to do a factory reset or something of that sort, I have no problems doing that.
2. As I mentioned at top, I do have a stock firmware downloaded from this link here: https://samfrew.com/download/Galaxy__Tab__S6__Lite__-LTE-__/xs5l/SEB/P615XXU3BTI3/P615OXM3BTI3/
3. The tablet is: SM-P615 (Samsung Galaxy Tab S6 Lite (LTE), I bought the LTE so I could use it as my phone)
4. At the download mode, the OEM (Boot Loader) state is set to NO and the FFS (I don't remember if its FFS exactly at the moment, something FF I believe, I don't want to turn on my tablet at the moment) was set to NO.
5. The KG (No RMM mention that I could see anywhere) state is showing up as "Checking..."
What do I need to do to fix my tablet? do I need to wait for 7 days? if so how do I do so, like does leaving my tablet off count or not?
PS: I am a self-thought experienced low-level windows programmer, I've been doing programming for over 10 years now, never have worked with Android development but I can attempt to build something from source if necesarry, I know very little about Linux OS as I purely work with Windows and use Windows for everything including servers.
I have done some research regarding that "integrity" error and I can't find any screenshot in google images that matches how it looks on my screen, but there are a lot of them quite similar to it, which basically says "verification failed, factory data reset your phone", in my case I don't have that message, it just says "integrity", but when the boot looping stops and shows that failure I do have 3 options, "try again" and "Factory data reset" and the 3th one I don't remember, I am suspecting that this could be my problem! I believe the samsung just changed the way that particular message is shown (visual change), so I just need a factory data reset and it will work, most likely with the rooted boot.img file! I will attempt this after a few hours of this reply, I may have panicked too early.
The issue has been fixed
Well this is surprising, I was about to do the factory reset but before doing so I decided to flash the same magisk patched boot.img file, when I flashed I saw seeing those 2 warning messages as expected, I was expecting for it to fail after 2 boot loops so I can do the factory reset as intended but on the 3th boot loop the tablet booted up! I was brought at the android setup screen, once I was done with that I checked the OEM Unlock, it was still checked and greyed out, downloaded Magisk Manager and to my surprised it worked! Magisk Root latest version is installed and working, it asked me to allow magisk do some "additional setup", the tablet booted up perfectly fine after that "additional setup", I check root privileges using "Root Checker" and it worked, I have root privileges! I most likely have panicked too soon, sorry for wasting your time! Hopefully this post will be useful to someone in the future looking to root their tablet.
My assumption of what happened: When I flashed the stock firmware AP a second time so I can turn off my tablet, it most likely did a factory reset without me knowing, so when I flashed magisk again before letting it try boot up again, the tablet booted perfectly fine because factory reset has already occured, which brought me to the android setup screen.

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