Downgrading question - Samsung Galaxy Note 9 Questions & Answers

Hi
I need to downgrade a note 9 from Android 10 to 8.1. When I was going to unlock bootloader, it gave me warning that some random things won't work if use custom os but I just want to downgrade. My question is that after I downgrade, can I lock the bootloader again.
Thank you so much

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Is it possible to root on 5.1.1

T-Mobile just pushed out the 5.1.1 update this morning and I hopped on it instantly. I was just wondering is it possible to root my phone in its current state (23.4.A.0.580) or do I have to downgrade and then upgrade again? This is my first real phone and I want to debloat it and get AdAway and all of the other fun Android stuff to get the best experience. I still have a 1.5 year warranty and from what I read unlocking my bootloader will void that. Are there any methods/guides to root my phone, downgrade, root, then upgrade again, etc. without unlocking my bootloader? Thanks in advance!
zarzuh said:
T-Mobile just pushed out the 5.1.1 update this morning and I hopped on it instantly. I was just wondering is it possible to root my phone in its current state (23.4.A.0.580) or do I have to downgrade and then upgrade again? This is my first real phone and I want to debloat it and get AdAway and all of the other fun Android stuff to get the best experience. I still have a 1.5 year warranty and from what I read unlocking my bootloader will void that. Are there any methods/guides to root my phone, downgrade, root, then upgrade again, etc. without unlocking my bootloader? Thanks in advance!
Click to expand...
Click to collapse
Start here
http://forum.xda-developers.com/z3-compact/general/ref-roms-guides-tutorials-faqs-t3035066
And use this
http://forum.xda-developers.com/z3-compact/general/how-to-root-backup-drm-keys-t3013343
And please read the thread even if its very long - all questions regarding rooting are ask and answered already...
I'm also quite new on this phone - But after reading this (the OP and thread!), you'll know everything needed!
But to answer your queston: You have to go back to KK to do initial rooting...

Help locking bootloader on version C.31

Ok so in short I unlocked the bootloader a while back, installed TWRP and magisk and I'm on version RMX1931EX_11_C.31. I would like to update to the newest version and lock the bootloader again.
Problem is since everything is in chaos I have no idea what to do especially since it's been a while since I unlocked the bootloader and installed TWRP.
So my question is simply what do I gotta do to basically get the X2 back into stock form and how large is the risk that I might brick it?

Question Downgrade to android 11/Unlock bootloader

Hello. I want to downgrade back to android 11 and I know unlocking the bootloader is needed in order to flash stock ROM. I read that oppo doesn't give the possibility to unlock the bootloader, is it correct or did anybody find a way? Thanks!!

Question Root or block BL?

I have a Moto Edge S pro, and he came with the global ROM, and of course, with the BL unlocked. My question is: if I root my device, will I be able to install android 13??? Cause he still on Android 11 and it takes a lot of battery, and using root can I block the bootloader? Or just using the unlocked bootloader, can I update my phone by myself? If yes, how? I saw here a lot of manuals but I'm not confident to do by myself without help, can someone help me? Thank you everybody!!!
There is no problem
I have official ROM 13
After the update locked the bootloader
and no problem(moto edge s pro)
sadra9074 said:
There is no problem
I have official ROM 13
After the update locked the bootloader
and no problem(moto edge s pro)
Click to expand...
Click to collapse
Ok, I downloaded the stock rom (using the RMSA) but how can I know that it's already the one with android 13? Because my BL still unlocked and I know I have to put the command to lock again. So, if I install again the stock ROM of android 11 and block the BL, when my phone turns on, will I be able to update using OTA?
My suggestion that once the bootloader unlocked on a motorola phone let it stay unlocked then flash whatever compatible rom you want but don't lock back. Sometimes under special circumstances locking back can brick a phone. If there is an anti-rollback protection in your phone then it can brick the phone with locked bootloader and previous Android version.

How to Unlock Bootloader Asus Rog Phone 3 (06/27/2023)

I created this topic because I can't find a way to unlock the bootloader of my Asus Rog Phone 3. Regarding whether or not I unlocked it before, I would think not, since it was a high-end phone, when I bought it, it did not cross my mind unlock bootloader, root, install GSI roms, among others.
My Rog Phone 3 had Android 12 installed, I tried to Downgrade to Android 11, Downgrade to Android 10, and then use the Asus Original Unlock tool (using all its versions) without favorable results to unlock bootloader.
I also tried EDL Unbrick, although I don't know if there is any tool to unlock bootloader with EDL, tools, anyway, I open this question to see if there is any way today to unlock the bootloader of my Asus Rog Phone 3 (it has 12GB of RAM, It is optional, just in case.) Someone who can help me or access me, I would be very grateful, excuse my English. My goal is to unlock bootloader to root it and then install GSI roms, especially install GSI roms ..

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