***Warning*** DO NOT FLASH/INSTALL NEW MARSHMALLOW UPDATES! - Samsung Galaxy J5 Guides, News, & Discussion

Samsung Galaxy J5 (2015)​
DO NOT FLASH/INSTALL NEW MARSHMALLOW UPDATES BECAUSE YOU CAN'T DOWNGRADE TO 5.1.1 ANYMORE !!!
DO NOT UPDATE YOUR PHONE ON 5.1.1, NEITHER ON 6.0.1 THROUGH SOFTWARE UPDATE !!!
( If you are on 5.1.1/6.0.1 and you update it from Settings > About phone > Software Update, I think you might end with same problem. )
ORIGINAL POST: http://forum.xda-developers.com/showpost.php?p=69504640&postcount=362 .
QUOTES:
KingWilliams said:
A warning to all ... samsung has come up with marshmallow bootloaders starting from baseband versions J1 (this is the last 2 values of baseband version) which will NOT allow u to downgrade ur bootloader...it will show an error like aboot.mdn fused ..which means u are stuck on marshmallow forever until a newer baseband is available...so be careful while upgrading to marshmallow from lollipop fellas :good:
Click to expand...
Click to collapse
milad wolf said:
hi . i cant back to stock android 5.1.1 in j5h ( in new secure update on all galaxy phones if you install last version of rom . downloading dosnt let to install old rom) . and becouse of that i cant install cm12.1 too. any solutions?
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Click to collapse
Proxy101 said:
Hi good people of XDA, i'm currently running a samsung j500h with a 6.0.1 update.
I really want to root it. I tried every possible way and followed every instruction on every sites that i went through (including here). But it doesn't seem to work on my phone. So i asked a developer form facebook and he suggested that i try downgrading to lollipop, from there root my phone and install a pre rooted 6.0.1 rom. But i cant do that as well.
Here are the errors that i'm getting:
CF-autoroot,twrp and su update flash: phone cant boot into recovery, it shows the samsung logo but with a black line that ramdomly pops on any part of the screen and slowly making it blur.
Cf auto root on the other hand, makes my phone stuck on the logo. it never boots now matter how long i wait.
Downgrading:
Error on phone says like these: aboot write fail: Fused 2>binary 1 (something like that)
it still boots and still on 6.0.1.
Does someone here has the same problem?
Click to expand...
Click to collapse
Unfortunately, i couldn't find any fix/tips about this after a Google search.
I'm not sure, but I think that if Samsung release new 5.1.1 updates, maybe it will have a new bootloader too and maybe then we can downgrade from 6.0.1 to 5.1.1.

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#Henkate said:
DO NOT FLASH/INSTALL NEW MARSHMALLOW UPDATES BECAUSE YOU CAN'T DOWNGRADE TO 5.1.1 ANYMORE !!!
DO NOT UPDATE YOUR PHONE ON 5.1.1, NEITHER ON 6.0.1 THROUGH SOFTWARE UPDATE !!!
( If you are on 5.1.1/6.0.1 and you update it from Settings > About phone > Software Update, I think you might end with same problem. )
ORIGINAL POST:http://forum.xda-developers.com/showpost.php?p=69504640&postcount=362 .
QUOTES:
Unfortunately, i couldn't find any fix/tips about this after a Google search.
I'm not sure, but I think that if Samsung release new 5.1.1 updates, maybe it will have a new bootloader too and maybe then we can downgrade from 6.0.1 to 5.1.1.
This thread should be sticky, but I don't know if we, users, can do it. So I will contact a moderator.
Click to expand...
Click to collapse
Samsung has indeed become a huge crap. Android is an open source but these dudes always tend to make it a closed source. Really upset with this but we have no choice. Whether u update manually or via kies it will be the same.
And thanks henkate for making this thread. This will be proved useful to many. :good:

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I got reply from moderator regarding sticky thread and he told me that sticky thread is not necessary because there are too low discussions on our J5 forum (it's not so popular) and that when our J5 forum will be more "developed"/popular, we could have a sticky thread which would contain all those important threads.
So, this thread will not be on top of this section ( Guides, News & Discussions) when there will be new threads or new posts in other threads.

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thank u so much big bro
#Henkate said:
DO NOT FLASH/INSTALL NEW MARSHMALLOW UPDATES BECAUSE YOU CAN'T DOWNGRADE TO 5.1.1 ANYMORE !!!
DO NOT UPDATE YOUR PHONE ON 5.1.1, NEITHER ON 6.0.1 THROUGH SOFTWARE UPDATE !!!
( If you are on 5.1.1/6.0.1 and you update it from Settings > About phone > Software Update, I think you might end with same problem. )
ORIGINAL POST: http://forum.xda-developers.com/showpost.php?p=69504640&postcount=362 .
QUOTES:
Unfortunately, i couldn't find any fix/tips about this after a Google search.
I'm not sure, but I think that if Samsung release new 5.1.1 updates, maybe it will have a new bootloader too and maybe then we can downgrade from 6.0.1 to 5.1.1.
Click to expand...
Click to collapse
Thanks for this

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Thanks. I was going to flash new one but stopped after reading this
Sent from my SM-J500F using Tapatalk

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#Henkate said:
DO NOT FLASH/INSTALL NEW MARSHMALLOW UPDATES BECAUSE YOU CAN'T DOWNGRADE TO 5.1.1 ANYMORE !!!
DO NOT UPDATE YOUR PHONE ON 5.1.1, NEITHER ON 6.0.1 THROUGH SOFTWARE UPDATE !!!
( If you are on 5.1.1/6.0.1 and you update it from Settings > About phone > Software Update, I think you might end with same problem. )
ORIGINAL POST: http://forum.xda-developers.com/showpost.php?p=69504640&postcount=362 .
QUOTES:
Unfortunately, i couldn't find any fix/tips about this after a Google search.
I'm not sure, but I think that if Samsung release new 5.1.1 updates, maybe it will have a new bootloader too and maybe then we can downgrade from 6.0.1 to 5.1.1.
Click to expand...
Click to collapse
Even If u cant downgrade Bootloader, you can always just repack the system boot and recovery from 5.1.1 and flash and TADA you are back on Lollipop

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oranaise2412 said:
Even If u cant downgrade Bootloader, you can always just repack the system boot and recovery from 5.1.1 and flash and TADA you are back on Lollipop
Click to expand...
Click to collapse
I dont know if its easy like that since other people with other Samsung phone couldnt solve this.

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Another guy got same problem with downgrading:
http://forum.xda-developers.com/galaxy-j5/help/flashing-twrp-error-samsung-j500h-t3501187 (read at "Downgrading").
PS: Please dont quote the OP. Thank you!

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I know that you have asked and been told no but we have got to keep this at the top of this thread.
This is so important for people to know.
What's are best option to keep this at the top ?
John

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oranaise2412 said:
Even If u cant downgrade Bootloader, you can always just repack the system boot and recovery from 5.1.1 and flash and TADA you are back on Lollipop
Click to expand...
Click to collapse
It won't flash. Even if it flashes, without the right bootloader ur phone wont boot at all.
Edit:
If i am wrong, u can always suggest a solution. :good:

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KingWilliams said:
It won't flash. Even if it flashes, without the right bootloader ur phone wont boot at all.
Edit:
If i am wrong, u can always suggest a solution. :good:
Click to expand...
Click to collapse
Your correct with what your saying mate
I'm guessing that this could mean all future stock Roms are gonna have this issue ???
John

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KingWilliams said:
It won't flash. Even if it flashes, without the right bootloader ur phone wont boot at all.
Edit:
If i am wrong, u can always suggest a solution. :good:
Click to expand...
Click to collapse
Well depends always on the BL but in most cases my solution works

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oranaise2412 said:
Even If u cant downgrade Bootloader, you can always just repack the system boot and recovery from 5.1.1 and flash and TADA you are back on Lollipop
Click to expand...
Click to collapse
Agreed. Quite often Samsungs bootloaders are backwards compatible with previous firmware.
Boot.img and system.img should be all that is required to downgrade and possibly NON-HLOS.BIN if there are wifi issues.
Not only that there's a possibility the bootloader doesn't need to be flashed and the MM rom will boot with the lollipop bootloader.
However there are no guarantees either way.

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ashyx said:
Agreed. Quite often Samsungs bootloaders are backwards compatible with previous firmware.
Boot.img and system.img should be all that is required to downgrade and possibly NON-HLOS.BIN if there are wifi issues.
Not only that there's a possibility the bootloader doesn't need to be flashed and the MM rom will boot with the lollipop bootloader.
However there are no guarantees either way.
Click to expand...
Click to collapse
Well, someone of the guys which can't downgrade anymore should try this and report.
EDIT:
@Proxy101 : Can you try this to downgrade to 5.1.1 and report if it works?
Even If u cant downgrade Bootloader, you can always just repack the system boot and recovery from 5.1.1 and flash and TADA you are back on Lollipop
Click to expand...
Click to collapse
Agreed. Quite often Samsungs bootloaders are backwards compatible with previous firmware.
Boot.img and system.img should be all that is required to downgrade and possibly NON-HLOS.BIN if there are wifi issues.
Not only that there's a possibility the bootloader doesn't need to be flashed and the MM rom will boot with the lollipop bootloader.
However there are no guarantees either way.
Click to expand...
Click to collapse

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fake
i have j500FN i flashed marshmallow -- downgrade on lolipop flash CM12.1 from nick verse ---wipe all flash marshmallow via odin and again downgare all work good without errors

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wyr007 said:
i have j500FN i flashed marshmallow -- downgrade on lolipop flash CM12.1 from nick verse ---wipe all flash marshmallow via odin and again downgare all work good without errors
Click to expand...
Click to collapse
It's not fake. The two users who reported has J500H. The latest firmware changelist of J500H is not same as J500FN one (also I don't see a firmware with "J" at FN). Maybe the new update didn't come on J500FN yet.
Whether you believe it or not, it's up to you. Keep updating if you want, but then don't complain here that you can't downgrade.
You've been warned about this.

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Thread cleaned up of all Off Topic Posts.
Also bump again and again is really not needed. Please don't do that again.
Can we please stay on topic?

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Thank for this useful thread. Stay at cm12.1 @nick_verse after read this thread
Sent from my SM-J500G using Tapatalk

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Just had an idea... We could spread these news by adding this thread with red color in our signature. You can edit your signature here: http://forum.xda-developers.com/profile.php?do=editsignature .
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