any way to downgrade bootloader? - Samsung Galaxy S7 Edge Questions and Answers

Hi All I was so excited to install TWRP and root and install a custom rom and I think I have a newer bootloader than is required for most of the Roms here.... Is there anything I can do? any way to downgrade firmware?

Yes, downgradable using odin

Player04 said:
Yes, downgradable using odin
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how do i know which country and version to flash? ( i have international but use in united states) just flash stock firmware from those firmware download sites? which version/country? I have international version. does it matter? do i follow this guide? http://galaxys7root.com/galaxy-s7-s...t-galaxy-s7-or-s7-edge-with-stock-firmware/2/

Which carrier do you have? Im using g935fd with att..i flash the latest bootloader and modem..download hero2lte (root and twrp) flash it in "AP", then flashed decent rom 2.0. battery life is insanely long.

I to am interested in downgrading my bootloader I keep getting "sw rev check fail device 2 binary 1" when I try in Odin

JeffG79 said:
I to am interested in downgrading my bootloader I keep getting "sw rev check fail device 2 binary 1" when I try in Odin
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Anyone?

Player04 said:
Yes, downgradable using odin
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How?

JeffG79 said:
Anyone?
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me too i dont know what to do now

I also have an error but someone can tell me if I risk doing a hard bricked or a black screen. Everything works fine, I all flash but the bootloader, everything is fine. Is this normal

Related

i9500 odin fail Help pls

Hi mate my s4 stock firmware 4.3 Turkey rom flash and odin fail give error and download mode sw check fail device 3 binary 2 writes help me please ???
emre9363 said:
Hi mate my s4 stock firmware 4.3 Turkey rom flash and odin fail give error and download mode sw check fail device 3 binary 2 writes help me please ???
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Do not someone who knows please help me
emre9363 said:
Do not someone who knows please help me
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What was the last firmware on your phone before you decided to flash?
Paolonicus said:
What was the last firmware on your phone before you decided to flash?
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the latest 4.4.2 stock ROM had russia
emre9363 said:
the latest 4.4.2 stock ROM had russia
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Are you still using an older version of Odin?
Try using v3.09, and flash the Firmware as AP.
Paolonicus said:
Are you still using an older version of Odin?
Try using v3.09, and flash the Firmware as AP.
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I'm flashed odin v3.09 try but don't do it
emre9363 said:
I'm flashed odin v3.09 try but don't do it
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I suggest download first the Russian Firmware and try flashing that. Otherwise your only hope would be to JTAg your phone.
You want to downgrade from 4.4.2 to 4.3 ?
Are you on the new bootloader?
Hit the thanks button if I was able to help you
S4 9505 / Note 10.1 2014 P600
emre9363 said:
Do not someone who knows please help me
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Its very difficult when people cant communicate in proper English.
theunderling said:
Its very difficult when people cant communicate in proper English.
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why it is giving error "sw rev check fail device 3 binary 2" ???
If i understand you correctly you want to downgrade from android 4.4.2 to 4.3. That is not possible with odin. You have to flash a custom rom via recovery with a clean install
S4 9505 / Note 10.1 2014 P600
Hit the thanks button if I was able to help you

Downgrade n910h to kk

I updated my N910H to the COJ4 FW and now everytime I try flashing any othe FW I get SWREV error. I need to downgrade the bootloader so as to install KK FW. Please help
Muthumbi said:
I updated my N910H to the COJ4 FW and now everytime I try flashing any othe FW I get SWREV error. I need to downgrade the bootloader so as to install KK FW. Please help
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What was your bootloader before?
usmann_090 said:
What was your bootloader before?
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COH2. I never had a problem downgrading before till I flashed COJ4
Muthumbi said:
COH2. I never had a problem downgrading before till I flashed COJ4
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From where did you find this bootloader?
& what modern youare using right now ?
usmann_090 said:
From where did you find this bootloader?
& what modern youare using right now ?
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Sammobile. I am using COJ2 modem
Muthumbi said:
Sammobile. I am using COJ2 modem
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You flahed the stock ROM & bootloader along with it
Or just flahsed boot loader and modem ?
& are there any problems on this bootloader due to which you want to return back to kk?

Downgrade apg1 to pd8?

Is it possible if so how to do it
Don't think so. I heard that the bootloader is different in PD8. Can't hurt to try though, right?
let me know if you can I would like to downgrade to PD7 so I can flash SM-G935U since it is also U2
---------- Post added at 06:04 PM ---------- Previous post was at 05:54 PM ----------
You can try flashing the ENG BOOT then downgrading it to PD8
Yes its possible. Go to the firmware thread and download the pd8 firmware and extract it. Open Odin and put each file in it's respected place (file that starts with ap in the ap slot, CSC in the CSC slot etc) and then flash. After reboot you should be good to go. Warning though, make sure you have everything backed up somewhere else though because it will wipe your entire internal data.
Sent from my SM-G935T using Tapatalk
tp2215 said:
Yes its possible. Go to the firmware thread and download the pd8 firmware and extract it. Open Odin and put each file in it's respected place (file that starts with ap in the ap slot, CSC in the CSC slot etc) and then flash. After reboot you should be good to go. Warning though, make sure you have everything backed up somewhere else though because it will wipe your entire internal data.
Sent from my SM-G935T using Tapatalk
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have you successfully tried it?
I have done it many times already. I'm currently on it.
omf05 said:
I have done it many times already. I'm currently on it.
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Have to tired to go to PD7???
newuser1984 said:
Have to tired to go to PD7???
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you mean we cant flash U firmware on PD8?
pattriccio said:
you mean we cant flash U firmware on PD8?
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? maybe flash ENG boot and flash U firmware the problem is T-mobile is the only one with V3 boot loader and everyone else is v2 it gives error because of it
newuser1984 said:
�� maybe flash ENG boot and flash U firmware the problem is T-mobile is the only one with V3 boot loader and everyone else is v2 it gives error because of it
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I think v3 is only on PG1 - but but not sure.
gaww said:
I think v3 is only on PG1 - but but not sure.
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anyone tried flashing U firmware on pd8?
pattriccio said:
anyone tried flashing U firmware on pd8?
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Even on PD8 since it is V3 boot loader it will not allow since the error message states you are trying to downgrade the boot loader from V3 to V2. As anyone has tired to go to PD7?
the guy here is this tread http://forum.xda-developers.com/tmobile-s7-edge/help/yes-downgrade-apg1-to-apd8-t3450382/page2 said you can flash "downgrade APG1 to APD8!!!!!" he has not responded to any one yet. we want to see some proof. he also said
lincolnsxda said:
First, flash ENG boot in the AP. Then, go back immediately and flash the CSC CP and AP of the ROM of your choice. Simple, easy, DOWNGRADE COMPLETE!!!
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if this is true I will try it. if it does work is there a v2 bootloader that we could flash to our phones that is unlocked and will work on t mobile even if its not for t mobile.
goofwear said:
the guy here is this tread http://forum.xda-developers.com/tmobile-s7-edge/help/yes-downgrade-apg1-to-apd8-t3450382/page2 said you can flash "downgrade APG1 to APD8!!!!!" he has not responded to any one yet. we want to see some proof. he also said
if this is true I will try it. if it does work is there a v2 bootloader that we could flash to our phones that is unlocked and will work on t mobile even if its not for t mobile.
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I doubt that one will work, but tp2215 on this thread said it can be done with only ODIN ??
Update - the thread above was closed by moderator - 100% troll thread.
pattriccio said:
you mean we cant flash U firmware on PD8?
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I don't believe we can flash it on anything with a v3 bootloader.
We're out of luck until the SM-G935U's bootloader is updated.
Apparently T-Mobile is the only one pushing out the new bootloader. ATT & Verizon can still flash SM-G935U firmware.
shadezero said:
I don't believe we can flash it on anything with a v3 bootloader.
We're out of luck until the SM-G935U's bootloader is updated.
Apparently T-Mobile is the only one pushing out the new bootloader. ATT & Verizon can still flash SM-G935U firmware.
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Yeah - and if TMO kept it's "promise", it would have been unlocked....
I don't understand what the big deal is? I was on pd8 and did Odin (NOT OTA) to pg1. I then did Odin from pg1 to pd8. Why is everyone trying to figure out of it works? What's different about the bootloader because I even flashed the pg1 bootloader and then went back to pd8.
xLegacyGT said:
I don't understand what the big deal is? I was on pd8 and did Odin (NOT OTA) to pg1. I then did Odin from pg1 to pd8. Why is everyone trying to figure out of it works? What's different about the bootloader because I even flashed the pg1 bootloader and then went back to pd8.
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I think this was while back. no need for this anymore.

Downgrade to Marshmallow

Hi, I want to downgrade back to Android 6.0.1 Marshmallow by flashing it through Odin. But when it starts flashing, the box says FAIL. Any solution to fix this? Thank you in advance.
Current Version on my J5 Prime: G570YDXU2BRC1 (XTC)
NoorSyafiq2014XDA said:
Hi, I want to downgrade back to Android 6.0.1 Marshmallow by flashing it through Odin. But when it starts flashing, the box says FAIL. Any solution to fix this? Thank you in advance.
Current Version on my J5 Prime: G570YDXU2BRC1 (XTC)
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Before flashing the firmware you need to flash the marshmallow bootloader and modem for your device then you can successfully flash firmware.
garylawwd said:
Before flashing the firmware you need to flash the marshmallow bootloader and modem for your device then you can successfully flash firmware.
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this is what i get
NoorSyafiq2014XDA said:
this is what i get
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Try just ticking tp in Odin not all of them
garylawwd said:
Try just ticking tp in Odin not all of them
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What do you mean my "ticking tp in odin not all of them"? Sorry im slightly confused a little.
NoorSyafiq2014XDA said:
What do you mean my "ticking tp in odin not all of them"? Sorry im slightly confused a little.
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AP I mean sorry. Look at all the boxes you ticked to flash on the right hand side. Only AP should be selected
garylawwd said:
AP I mean sorry. Look at all the boxes you ticked to flash on the right hand side. Only AP should be selected
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I tried, and it downgraded to Marshmallow. But it doesn't downgrade the bootloader.

Confused with flashing new firmware

Have a Galaxy S8 G950U that has T-Mobile firmware with bootloader version 7. Can not seem to flash any other firmware with bootloader version 7 with Odin. It just fails with no error code. Tried several different versions of Odin to no avail... any suggestions?
TheGhost1951 said:
Have a Galaxy S8 G950U that has T-Mobile firmware with bootloader version 7. Can not seem to flash any other firmware with bootloader version 7 with Odin. It just fails with no error code. Tried several different versions of Odin to no avail... any suggestions?
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Possibly wrong version of Odin. 3.13 it's needed.
Yes thank you...finally figured it out because of the g7 bootloader..
TheGhost1951 said:
Yes thank you...finally figured it out because of the g7 bootloader..
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awesome glad to see you got it
I was at bootloader v2 until I changed carrier to T-Mobile and they updated firmware to BL v7. Now I guess I am stuck here with no chance of root with custom FW. Not even safestrap has an update for BL v7...oh well not going to cry in my beer.
TheGhost1951 said:
I was at bootloader v2 until I changed carrier to T-Mobile and they updated firmware to BL v7. Now I guess I am stuck here with no chance of root with custom FW. Not even safestrap has an update for BL v7...oh well not going to cry in my beer.
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No not yet. I posted up the combo we need. For the boot img. But we still need the edl files.
Can you pass along the link to that thread....would appreciate it..by the way, is there a tutorial out there for learning to do the programming we need? I use to do commercial programming in COBOL, then some in visual basic. Might give it a whirl to try and help out where I can....

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