T-719Y Downgrade from Nougat to Marshmallow - Galaxy Tab S2 Q&A, Help & Troubleshooting

I just bought a T-719Y off eBay, and it comes with Nougat installed out of the box despite the description saying it is Marshmallow.
I have tried simply downgrading the device with Odin using a .md5 for my specific device. However, the Tab shows an error saying
[aboot]Fused 3 > Binary 1
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Click to collapse
I assume this is because the bootloader for Nougat is newer than Marshmallow.
Is there anyway to downgrade the bootloader itself? Or am I mistaken about this assumption? Searches on downgrading this device seem to imply that flashing the file with ODIN is enough. Is an unlocked bootloader necessary for a downgrade?
Thanks for the help!

Related

Is G925VVRS4DQD1 (Nougat) Root-able yet?

I got a Samsung S6 Edge (Verizon SM-G925V) today and heard I should upgrade to 7.0 (Nougat) firmware and hope it gets rooted soon. Is the baseband version I have root-able? It's G925VVRS4DQD1
To my understanding, the tool on autoroot.chainfire.eu WOULD work, but because the bootloader is locked down, it will brick the device instead? Is that true? Is there any hope that 7.0 will be rooted soon for my device? Any input on this would be helpful, thanks.
TofuStranger said:
I got a Samsung S6 Edge (Verizon SM-G925V) today and heard I should upgrade to 7.0 (Nougat) firmware and hope it gets rooted soon. Is the baseband version I have root-able? It's G925VVRS4DQD1
To my understanding, the tool on autoroot.chainfire.eu WOULD work, but because the bootloader is locked down, it will brick the device instead? Is that true? Is there any hope that 7.0 will be rooted soon for my device? Any input on this would be helpful, thanks.
Click to expand...
Click to collapse
I tried it it said something about recovery not sure what but in Odin on the phone screen it said recovery fail
So do i. However, it won't brick your phone. One time i tried to upgrade to 7.0 or downgrade to 6.0, first boot i saw a pic of a lock is unlocked when i first boot. Next time i boot, it disapppears. Any idea?
I think this phone is unrootable for now since Verizon is like "you can't make it because i don't wanna my phone naked, haha"
Same problem here. recovery fail. How can I root my G925V Nougat?

Downgrade Options? SM-T710 Nougat

I have a tab s2 sm-t710 on nougat T710XXU2DQCL that was installed OTA and would like to know if i am able to downgrade to 6.0.1. The device is 100% stock and was wondering if ODIN would give me any grief about downgrading. The PDA number of the 6.0.1 file is T710XXU2CPK1 (Cellular South).
Thanks
On paper, I think you should be fine. :angel:
I'd also like to know this as battery life seemed much better on 6.0.1 for me.
i did downgrade my T 815 from 7.0m to 6.01 using odin. didnt face any difficulties. i did a complete wipe/format after i downgraded .
Can you not downgrade with TWRP as well?
Anyone knows how can I downgrade this tablet? It's in stock
Kyrat said:
Anyone knows how can I downgrade this tablet? It's in stock
Click to expand...
Click to collapse
I used Odin and firmware downloaded from sammobile and it worked flawlessly. I've performed downgrades on over 100 tablets so far and they have all worked good.
Downgrded my t713 long time ago and didn't have a single problem, you just need to download a compaitable firmware from sammobile!
Kyrat said:
Anyone knows how can I downgrade this tablet? It's in stock
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Click to collapse
You're safe to downgrade as long as it's allowed. Older builds will fail immediately so there is no harm to downgrade.
I've seen a few people asking about downgrading. Whats the reason behind this? Is N glitchy?
Need help downgrading SM-T719Y
Hawkhell said:
I've seen a few people asking about downgrading. Whats the reason behind this? Is N glitchy?
Click to expand...
Click to collapse
N does not work at all well with DJI drone remote controllers. I foolishly updated my brand new SM-T719Y 8" and Now I cannot connect to my drone at all. I have an pre 2016 Tab S2 on Android 6.01 and bingo works.
This size pad is the preferred size for drones and has enough grunt to provide stutter free vision. Cannot comment on anything else about N as this pad will only be used for my drone...
Yt2...
Beut said:
You're safe to downgrade as long as it's allowed. Older builds will fail immediately so there is no harm to downgrade.
Click to expand...
Click to collapse
Hi Beut,
I have been trying yo downgrade my Tab S2 SM-T719Y LTE from Nougat to 6.01 and have correct downgrade and Odin. Every time I try to downgrade it fails straight away, so I was wondering what you ment by "as long as it is allowed" & "older builds" will fail immediately.
I need to get this happening as I cant fly my drone.
Cheers Yts...
I don't have your model so it cannot verify. However, other models I can downgrade to older builds close to the Nougat.
Like SM-T580 or SM-P580, both are Android 7, QF1 and QE4 respectively. I can downgrade them to PL4 or PL2, Android 6 but not the PG1.
Q: 17 or 2017
P: 16 or 2016.
The second letter is the month it's released.
You also need the right bootloader, different OS has different bootloader. Many just flash the AP file only without bootloader, it'll failed when downgrade.
Is it possible that you cannot downgrade Nougat to 6.01 as every time I try on my SM-T719Y Tab S2 LTE, it fails straight away. I have tried 3 different downloads and all failed, but Odin will let me overwrite my Nougat with a downloaded version of Nougat from the same web location as I got one of the 6.01 firmwares from.
Here are my fail messages.
View attachment 4242043 View attachment 4242046
Is it me or is it this model of the Tab S2 SM-T719Y????
When downgrade to MM you need the BL ( Bootloader ) goes with the AP . Boot loader of Nougat is not the same as MM , however bootloader of LTE version is locked
Sammy doesn't want you to downgrade.. nougat is planned obsolescence, I'd say.
Beut said:
When downgrade to MM you need the BL ( Bootloader ) goes with the AP . Boot loader of Nougat is not the same as MM , however bootloader of LTE version is locked
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Click to collapse
Hey I've been trying to downgrade my T719Y for days now. Constantly failing and googling everything I can to find where I'm going wrong.
How would I know if I have the LTE version? And if I do and the bootloader is locked, does that mean I can't downgrade?
If I don't have the LTE version, you're saying I need the bootloader and AP to downgrade? Where can I find the bootloader?
I'll keep searching and trying but this is wearing me down. Any assistance would be greatly appreciated. My surveyors can't do a damn thing with our giant UAV until I fix this
LTE version is the one that has SIM, usually it's next to SD slot. Most LTE versions have locked bootloader, that's why you cannot downgrade firmware.
I just kept an older phone for apps available only for 6.0. Like scr recorder. Otherwise there are no reasons to downgrade

how to dow

Hello, I cannot downgrade to Nougat, I keep getting "Sw Rev Check Fail Device 2 Binary 1" on the phone side and ODIN simply says failed. When I try to downgrade from Oreo to Nougat. I have not been able to enable "OEM Unlock".
BTW, Sorry for incomplete title as the title bar disappears and I can only type a little bit.
Kenchinito said:
Hello, I cannot downgrade to Nougat, I keep getting "Sw Rev Check Fail Device 2 Binary 1" on the phone side and ODIN simply says failed. When I try to downgrade from Oreo to Nougat. I have not been able to enable "OEM Unlock".
BTW, Sorry for incomplete title as the title bar disappears and I can only type a little bit.
Click to expand...
Click to collapse
What model do you have? And what firmware version were you on before trying to downgrade? Some firmwares include bootloader updates which cannot be rolled back.
I have a N950F and this is the Oreo image I succesfully flashed "BL_N950FXXU3CRC1_CL13094739_QB17155977_REV00_user_low_ship.tar"
I can flash "COMBINATION_FA71_N950FXXU3ARA5" without a problem which is 7.1.1 But I think it's the bootloader that is giving me issues and since the combination file doesn't include a bootloader (AFAIK) it goes through, but when I try to put in any bootloader from Nougat, the flash fails.
I tried flashing:
-BL_N950FXXU1AQI1_CL12007350_QB14830234_REV00_user_low_ship.tar
-BL_N950FXXU1AQHB_CL12007350_QB14652984_REV00_user_low_ship.tar
and both failed. It's important to note that I'm trying to flash the whole thing, not just the "BL" file. I just pasted the BL file name because I think it holds the information you need.
Ok thanks for providing the info. One more question, what Odin version are you using?
It is not possible to downgrade.
sefrcoko said:
Ok thanks for providing the info. One more question, what Odin version are you using?
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Click to collapse
3.13.1
I have a similar problem. Bought my N950F in Panama but I'd like to change to Brazil's ZTO(unbranded) to be able to use Samsung Pay there.
I got Odin 3.13.1 and the ROM N950FXXU3CRDF_N950FOXM3CRE4_ZTO (latest 8.0.0) from SamMobile. When I try to flash I get the "Check Fail BOOTLOADER" message. Trying to uncheck the BL, I get another error but also not able to flash. Maybe my phone has a newer version that doesn't allow it to in theory "downgrade"?
Any solution?
carlosedp said:
I have a similar problem. Bought my N950F in Panama but I'd like to change to Brazil's ZTO(unbranded) to be able to use Samsung Pay there.
I got Odin 3.13.1 and the ROM N950FXXU3CRDF_N950FOXM3CRE4_ZTO (latest 8.0.0) from SamMobile. When I try to flash I get the "Check Fail BOOTLOADER" message. Trying to uncheck the BL, I get another error but also not able to flash. Maybe my phone has a newer version that doesn't allow it to in theory "downgrade"?
Any solution?
Click to expand...
Click to collapse
Yes some bootloaders can't be downgraded to earlier ones. What firmware version are you coming from?
sefrcoko said:
Yes some bootloaders can't be downgraded to earlier ones. What firmware version are you coming from?
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Click to collapse
@sefrcoko, I'm currently on Android 8.0.0, Baseband N950FXXU4CRG8, Build number R16NW.N950FXXU4CRGA.
I don't know if this is older or newer than the one I'm trying to flash. Is there a way to do it?
Thanks!
carlosedp said:
@sefrcoko, I'm currently on Android 8.0.0, Baseband N950FXXU4CRG8, Build number R16NW.N950FXXU4CRGA.
I don't know if this is older or newer than the one I'm trying to flash. Is there a way to do it?
Thanks!
Click to expand...
Click to collapse
Hi, yes you are on the "U4" bootloader and trying to downgrade to the "U3" bootloader (look at those characters in the build numbers, that's the bootloader version). Can't downgrade from u4 to u3 though.
sefrcoko said:
Hi, yes you are on the "U4" bootloader and trying to downgrade to the "U3" bootloader (look at those characters in the build numbers, that's the bootloader version). Can't downgrade from u4 to u3 though.
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Click to collapse
@sefrcoko this build number can bootloader unlock? i have same build number, i plan to unlock bootloader
paroys said:
@sefrcoko this build number can bootloader unlock? i have same build number, i plan to unlock bootloader
Click to expand...
Click to collapse
The Exynos models are all bootloader unlocked as far as I know.
sefrcoko said:
The Exynos models are all bootloader unlocked as far as I know.
Click to expand...
Click to collapse
Thanks , I'm already rooted haha:cyclops:
Can I flash everything except the bootloader? Will it work?
Do I have any option?
Thanks!

How to Downgrade to Oreo - N9500 Bootloader3

Hi.
I just received the Pie update to my Not8 256GB.
First I would like to check the actual version of my phone. I assume it's simple a N9500, but I guess I need to double confirm. How can I be 100% sure ?
Second, current my version shows N9500ZHU4DSE7. From what I have read, it should be bootloader 3. And normally I should be able to downgrade back to Oreo. I am just unsure how, and which firmware I should use.
Also if I downgrade, will I lose the phone internal data ?
Only reason why I NEED to downgrade : the software block to prevent using 2 sims and one sd card !
CrazyKoala said:
Hi.
I just received the Pie update to my Not8 256GB.
First I would like to check the actual version of my phone. I assume it's simple a N9500, but I guess I need to double confirm. How can I be 100% sure ?
Second, current my version shows N9500ZHU4DSE7. From what I have read, it should be bootloader 3. And normally I should be able to downgrade back to Oreo. I am just unsure how, and which firmware I should use.
Also if I downgrade, will I lose the phone internal data ?
Only reason why I NEED to downgrade : the software block to prevent using 2 sims and one sd card !
Click to expand...
Click to collapse
"N9500"ZHU4DSE7 is SM-N9500
N9500ZHU"4"DSE7 is the bootloader version. You are on ver. 4
You can't go back to bootloader version 3 or below! Bootloader won't allow it!
Fine the last oreo bootloader ver. That has bl. Ver 4 in the firmware.
Yes you would lose your data going from pie to oreo!
The last oreo firmware is N9500ZCU4CSA1 look on sammobile.com for your model and firmware.
Thank you for confirming what I also managed (in the meantime) to confirm.
Losing all data is a NO go for me
I could back up everything with Smart Switch, but not the entire Secure Folder
BluePhnx said:
"N9500"ZHU4DSE7 is SM-N9500
N9500ZHU"4"DSE7 is the bootloader version. You are on ver. 4
You can't go back to bootloader version 3 or below! Bootloader won't allow it!
Fine the last oreo bootloader ver. That has bl. Ver 4 in the firmware.
Yes you would lose your data going from pie to oreo!
The last oreo firmware is N9500ZCU4CSA1 look on sammobile.com for your model and firmware.
Click to expand...
Click to collapse
i tried to downgrade with this N9500ZCU4CSA1 version but still its saying failed plz help me i want to downgrade to oreo
asifuddin009 said:
i tried to downgrade with this N9500ZCU4CSA1 version but still its saying failed plz help me i want to downgrade to oreo
Click to expand...
Click to collapse
Which firmware are you on?
If you are on the latest firmware with N9500ZU"5".... you can NOT go back to Oreo!
Or if on N9500ZU"4".... try this below....
Did you try factory resetting your device before flashing that firmware.
Use all 4 files, AP, CP, BL, and with the CSC file (not the home-CSC file).

If i have twrp installed, can i flash older update with OLDER BOOTLOADER?

I am on dec 12 android 10 update right now. I've always wanted to try an early version of android 9 to check some different display qualities. But it obviously has older bootloader version. İf i install twrp, can i flash an update with older bootloader?
-Im rooted with magisk
theblitz707 said:
I am on dec 12 android 10 update right now. I've always wanted to try an early version of android 9 to check some different display qualities. But it obviously has older bootloader version. İf i install twrp, can i flash an update with older bootloader?
-Im rooted with magisk
Click to expand...
Click to collapse
No. Samsung won't allow you to flash lower bootloader version numbers firmware.
spawnlives said:
No. Sansung won't allow you to flash lower bootloader version numbers firmware.
Click to expand...
Click to collapse
Can I downgrade the Samsung Bootloader from SW Rev 3 to 2?
Hi, I want to downgrade my SM-A310F to earlier Android versions, but Odin blocks this with the Error: "SW REV. CHECK FAIL. DEVICE: 3. BINARY: 2." So apparently I can only install firmware files which come with the same Bootloader I'm currently...
forum.xda-developers.com
i saw this and thought maybe its possible
theblitz707 said:
Can I downgrade the Samsung Bootloader from SW Rev 3 to 2?
Hi, I want to downgrade my SM-A310F to earlier Android versions, but Odin blocks this with the Error: "SW REV. CHECK FAIL. DEVICE: 3. BINARY: 2." So apparently I can only install firmware files which come with the same Bootloader I'm currently...
forum.xda-developers.com
i saw this and thought maybe its possible
Click to expand...
Click to collapse
I have seen a few posts on downgrading OS version. They have been on older android version nothing on recent versions. I have not tried any methods to downgrade as most methods i've read there can be issues with doing so (if it works at all) in regards to something not working properly . Also all the methods i've seen don't downgrade you bootloader version.

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