Can I install a custom Nougat (SS-basesd) rom on Bootloader V3? - Samsung Galaxy S8 Questions and Answers

I'm using G950FXXU3CRGH Android 8 on S8 Exynos (SM-950FD)\
I have Facebook loading issue and battery life problem that make me really annoyed.
I want to know if I can downgrade to Android Nougat by Installing a custom rom (SS-based) while using V3 bootloader.
My phone is rooted , unlocked bootloader and twrp installed.
Thank you in advance.

I'm interested too.

There's no way of downgrading the 3th bl sammy released, tho the rollback to Nougat can't be made. Only from the first Crap bl you could have done it, atleast that's what I'm aware of.

Related

how to downgrade from lollipop to jellybean?

Can it is possible? I have official firmware of jellybean dwnlded from sammobile.
Help.!
Not possible as the Knox-enabled bootloader prevents downgrades. Even if you were able to downgrade, say by perhaps not downgrading the bootloader while downgrading everything else, it's unlikely the radios on the device will ever function. About the only use there is for such a downgrade is to carrier unlock the S4 using RegionLock Away, and even then you only have to flash a modem to do that.
Downgrading to Android 4.4.2 should be possible, if you really want to. I'd recommend flashing a custom ROM instead. All the custom ROMs, regardless of whether they are Touchwiz-based, GPE-based or Cyanogenmod-based, all include the battery drain bugfix that stock ROMs lack.
Thanks but i dont want now bcz voltaqe kernel has solved my problem i.e sound gain
Excellent! Good to hear you got things resolved.

Is there a problem if i update to latest stock rom?

Hi,
i want to buy a new note 4 - the version 910f.
If i update the new phone with stock 4.4.4 rom to the latest 5.1.1 - will there be any problem if i want to install root or anything like this later on? Can i still install custom roms?
I want to now this, becqause if i update my new amazon fire 7 (2015) to latest stock 5.1.1 rom - there is no chance to start recovery anymore for installing custom rom. With only 5.0.1 all is good and i can install custom rom with recovery.
Is there a similar problem with note 4 or can i install latest stock rom and won´t get any problems later?
Only thing i found is that i can´t go back to 4.4.4 when installing 5.1.1? And i can´t go back to 5 when i´m installaing marshmallow because of changing partitions size?
So if i go to stock 5.1.1 it doesn´t matter, because i don´t want to use 4.4.4 and i can still use all stock roms and change to marshmallow later?
Bib_x said:
Hi,
i want to buy a new note 4 - the version 910f.
If i update the new phone with stock 4.4.4 rom to the latest 5.1.1 - will there be any problem if i want to install root or anything like this later on? Can i still install custom roms?
I want to now this, becqause if i update my new amazon fire 7 (2015) to latest stock 5.1.1 rom - there is no chance to start recovery anymore for installing custom rom. With only 5.0.1 all is good and i can install custom rom with recovery.
Is there a similar problem with note 4 or can i install latest stock rom and won´t get any problems later?
Click to expand...
Click to collapse
No problem if you don't plan to use 4.4.4. Note that if you update to latest 5.1.1
>your bootloader will be locked you can't go back to previous roms or use custom roms which are based on earlier versions such as 4.4.4 custom roms or 5.0.1 custom roms.
>you can still root your phone install custom recovery and install custom roms which have newer bootloaders. However rooting 5.1.1 is bit different because with android 5.1.1 there is an extra security layer in the kernel which detects and stops device from being rooted you need a "permissive kernel" to root 5.1.1. And then you can do whatever you like.
Would it be a better decision to stay on 5.0.1 for the moment and later install 5.1.1 custom rom? To not loose unlocked bootloader?
And one more question: if I deactivate bloatware in application setting off stock rom, is bloatware complete deactivated or is it still running in the background somehow?
Bib_x said:
Would it be a better decision to stay on 5.0.1 for the moment and later install 5.1.1 custom rom? To not loose unlocked bootloader?
And one more question: if I deactivate bloatware in application setting off stock rom, is bloatware complete deactivated or is it still running in the background somehow?
Click to expand...
Click to collapse
You can install 5.1.1 with these bootloaders coj3, coi3, pok1 , coh4 these are safe and won't lock your bootloader. i'd recommend 5.1.1 over 5.0.1 because the difference is day and night in long term use (when u have many apps) 5.1.1 is much smoother and better battery life just don't install coj5 or newer bootloaders. I don't use custom roms because in my experience stock rom is the best custom roms have some bugs etc. If you deactivate bloatware in application settings then its no more running in background.
OK, thank you. But so I should deactivate ota updates and flash latest stock update with Odin, so that I don't get latest locked bootloader?
How can i update to latest 5.1.1 update and keeping the (old) unlocked bootloader?
Do i have to donwload version from smamobile and flash with odin? How can i disallow to update bootloader too?
And if i update with ota - i will get latest (locked) bootlader automatically - no chance anymore to remove it?
-----------------------------
I don´t want to root my phone the first time (because of knox) but later on i maybe want to root too.
Bib_x said:
How can i update to latest 5.1.1 update and keeping the (old) unlocked bootloader?
Do i have to donwload version from smamobile and flash with odin? How can i disallow to update bootloader too?
And if i update with ota - i will get latest (locked) bootlader automatically - no chance anymore to remove it?
-----------------------------
I don´t want to root my phone the first time (because of knox) but later on i maybe want to root too.
Click to expand...
Click to collapse
There is no way to be sure if the older bootloader will work with latest 5.1.1 rom. So its better to stick with the bootloader which comes with the rom and yes if you update with OTA you will get latest 5.1.1 and bootloader automatically. Just go to sammobile and download 5.1.1 with COJ3, COi3, or POK1 (nordic countries). and Flash with odin.

[Q] Bootloader on 6.0.1 update

As ive read, when the S5 gets updated to marshmallow the bootloader is updated too. Now im on 5.0 rom and using dualboot to boot CM13 also. Would I be able to boot those AOSP/CM roms again with this updated bootloader too? To be clear, im asking if i can still boot those custom roms (marshmallow not lollipop) even after the bootloader update. The update appeared today so im asking before updating.
Thanks
Starting from CM13 nighty 20160524, the MM bootloader is supported. I don't know regarding any other AOSP ROM.
The important change is https://review.cyanogenmod.org/#/c/146515

unlocked bootloader effects on ota installation or not

last time i unlocked my phone and installed another rom, but i dont like that. so i thought to revert to stock rom.
then i flashed stock cm12.1 , then again boot loader was locked.
then i unlocked bootloader only, so as if in any case i need to recover my data by rooting.
today i read a post on yuplaygod forums that they will release an ota soon,
i want to ask is there any problem if i install the OTA, any chances of device bricking or something else, because bootloader is unlocked, but phone is not rooted , everything else is true stock.
I sent my phone to service center when it has 5.1.1 of cyanogen mod and I don't know how they flash 5.0.2 of cyanogen mod it doesn't install any ota updates so I rooted and manually installed 5.1.1 officially by YU but the problem remains same. Can anybody help me.
Sent from my YU Yureka using XDA Labs

Planning to buy G935W8, had a few questions

Looking to buy this phone soon but I was just wondering about a few things. Im buying the canadian variant G935W8.
1. Can this device be rooted on nougat as well or only marshmallow? Im buying it brand new so I think it will probably be running the latest firmware.
2. Is there any issues with unlocking the bootloader? Is it neccesary to do so if you want root and custom roms?
the bootloader is not locked on the w8 as its the exynos variant and yes nougat can be rooted its the same as 935f
32dave said:
the bootloader is not locked on the w8 as its the exynos variant and yes nougat can be rooted its the same as 935f
Click to expand...
Click to collapse
Thanks. Also another question I had. If the phone comes with marshmallow and I root it will I be able to install nougat roms directly or will I have to update the bootloader and modem? In that case would it be better to update it to nougat first and then root?
Updating your phone would cause you to lose root anyways as the file structure on nougat is completely different then marshmellow.
Rooting also prevents OTA updates, so you would end up having to install nougat manually.
I suggest you upgrade your software then root it. You can use systemless root from magisk. Using TWRP just flash the latest magisk file and you are rooted. The file will automatically root your phone as part of the installation process.
Florad77 said:
Thanks. Also another question I had. If the phone comes with marshmallow and I root it will I be able to install nougat roms directly or will I have to update the bootloader and modem? In that case would it be better to update it to nougat first and then root?
Click to expand...
Click to collapse
If you get it with MM (highly unlikely) just don't do anything and you should get an OTA notification otherwise you can download Odin, google it as I don't have a link and nougat from here https://www.androidfilehost.com/?fid=457095661767144483 and you can flash it yourself now rooting is a little different then it used to be do a search on the s7 edge for the info on that
the reason is yes you will need to download the BL not sure about modem but you might as well do it too
I just rooted my G935W8 running 7.0 by following the instructions in the first half of this video.

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