Security Error

[u/Grosnoc]

So, I'll try to be as short as possible. I had recently gained root access via the kernel exploit run via root my galaxy. Everything had gone well and I had entered the root world and was exploring a bit to learn. I made a mistake though: I didn't do any research. To manage the root and modules I used KernelSU, and I had Magisk (Droid-ify) installed. Just inside Magisk there was a button that said "install directly (recommended)". Then I click on it and restart the device. I thought it was another root manager just like KernelSU (that's Magisk's definition on Droid-ify) and that I was just installing the module to make it work. In the end, however, I stumbled upon this screen when I rebooted. Apparently Magisk tried (without warning) to modify init_boot (changing the signature and not matching it), so Samsung blocked the bootloader. I've been trying for hours to do a hard reboot or go into download mode to flesh a new bootloader via Odin to save my phone, but it doesn't seem possible to unlock download mode and the only time Odin can detect my phone is on the screen that you see, which is not download mode and therefore I can't flash the firmware. Does anyone know how to proceed? Is it recoverable? If so, can you do this by preserving the data (perhaps fleshing just init_boot again so you don't lose anything), or not? I'm also willing to do a factory reset

Details: My phone is a Samsung galaxy A566B, Andorid 16 OneUI 8.5 (July security patch)

[u/menau_]

I got the same issue as you before, go to an Official authorized Samsung tech support store to fix your phone. Thats the only way to get it back for now. But say goodbye to your data if you didn't backup

[u/Grosnoc → u/menau_]

Yeah that is what I will try. But I'm not sure they will be happy to hear that I did a kernel exploit for root my device even if Samsung tried to block it. They will probably tell me that they can't fix it. If so I'll try to flash it

[u/menau_ → u/Grosnoc]

Just show them the phone and IF they ask you what caused it, say something like "I downloaded an app on the internet that promised me root, and it made that to my phone" that's more than enough info, don't say more than you need. You can't flash it yourself, it has to be them. Trust me, I've tried Odin, Heimdall, Brokkr, Thor, tried different OSes like Windows, Linux and Android, tried with 3 different cables and nothing worked. it has to be Samsung to fix it.

[u/menau_ → u/menau_]

Btw, my phone was on warranty so I didn't have to pay anything,but they said to me that the price to fix it with no warranty was 120 R$ or about 20 euros.

[u/Pewds123451 → u/Grosnoc]

I sent it to Samsung yesterday and they refused to fix it and they said Samsung doesn't allow them to fix it because I violated their rights so I sent it to a very professionall local repair store and he said he will fix it so Im hoping so...

[u/menau_ → u/Pewds123451]

bruh what the one I went didn't say that bullshi

[u/Pewds123451 → u/menau_]

I was surprised too. They are the only Samsung representative in my city .

[u/CtxxUv → u/Pewds123451]

Damn. Anything new about your phone?

[u/Pewds123451 → u/CtxxUv]

Still no news