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[DOWNGRADE] Oreo to Nougat

32 posts
Thanks Meter: 25
 
By lapaho, Member on 16th March 2018, 12:50 PM
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Our devices have been updated to Oreo by HTC, that was a good new since there are many reports and claims from the End Users that was an unstable update, so how to downgrade to a stable Nougat version, here is the way:

[IMPORTANT]
TESTED ON HTC U Ultra DUAL SIM (INDIA - SEA VERSION) and S-ON DEVICE ONLY with UNLOCKED BOOTLOADER, BUT THIS MIGHT WORK ON OTHER VARIANTS

I. PREPARATION
1. HTC Sync Manager for drivers: http://www.htc.com/us/software/htc-sync-manager/

2. ADB and Fastboot, u can use the latest version of Minimal ADB and Fastboot:
https://forum.xda-developers.com/sho....php?t=2317790 (thanks to @shimp208 for this great tool)

3. Stock Nougat RUU:
https://androidfilehost.com/?a=show&w=files&flid=164315 (thanks to @sardroid for RUUs uploading)
or for the tested device, this RUU has been used:
https://androidfilehost.com/?fid=962187416754465286 (thanks to @minhnewpro for uploading this)
or the latest 1.64.400.10 for Dual SEA - India I have just found
https://vnrom.net/2018/03/rom-stock-...ra-ocean-note/ (original link to support to the RUU publisher)

4. Latest version of TWRP recovery:
https://twrp.me/htc/htcuultra.html (thanks Team Win for this popular and useful TWRP)

5. The most important, HTC Version Tool:
https://drive.google.com/file/d/1ubj...b-YVkD4M7/view (thanks to @sabpprook for this super super great tool ^^ )

II. DOWNGRADING TO NOUGAT
1. Install HTC Sync Manager, ADB and Fastboot tool, extract HTC_Version_Tool.exe and copy it and twrp to your adb and fastboot folder
2. If your device's bootloader is unlocked, ignore this, if not
- go to https://www.htcdev.com/
- register for an account and then follow the site's instruction to unlock bootloader
3. Reboot your device into download mode and flash TWRP by opening cmd at your adb and fastboot folder and type:
Code:
fastboot devices
fastboot flash recovery twrp-3.2.1-1-oce.img
4. Boot device into Bootloader mode then boot to TWRP recovery
5. While your phone entered TWRP, open cmd, type:
Code:
adb devices
to check if your device is recognized
6. Once your device is recognized, open HTC_Version_Tool.exe
7. Type the version of the RUU that you are going to flash at new version line, for example, mine is 1.64.400.3 and press enter
8. Rename the RUU file to 2PZCIMG and REMEMBER TO KEEP .zip EXTENSION, then copy it to the root folder of SD Card (External SD Card is recommended)
9. Reboot your device into download mode, press Vol+, then press Power to start flashing 7.0 RUU
10. After flashing, your device can boot into Android but no signal or IMEI received, dont worry, continue these steps
11. Reboot into download mode, reflash TWRP, then boot to TWRP
12. At cmd windows, type
Code:
adb devices
adb shell
mke2fs -t ext4 /dev/block/bootdevice/by-name/persist
13. Reboot device to check if IMEI received
14. If IMEI received, you should reflash stock recovery from RUU.zip, but reflash the RUU is recommended.
If not, try to format the persist partition manually again (step 12)
15. Done

And at last, I want to say big thanks to @sabpprook for helping me a lot to downgrade the device and @paulpier007 for HTC U11 downgrade method which gave me the idea for downgrading our U Ultra (https://forum.xda-developers.com/u11...ougat-t3754481)
The Following 18 Users Say Thank You to lapaho For This Useful Post: [ View ] Gift lapaho Ad-Free
 
 
16th March 2018, 01:07 PM |#2  
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#reserved1
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16th March 2018, 01:07 PM |#3  
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#reserved2
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16th March 2018, 02:43 PM |#4  
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Shouldnt be posted in this one mate this custom roms should be q&a
But thanks
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16th March 2018, 02:44 PM |#5  
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Quote:
Originally Posted by panda968

Shouldnt be posted in this one mate this custom roms should be q&a
But thanks

Oops sorry for that :| how can i move this topic to Q&A
16th March 2018, 02:47 PM |#6  
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Its ok mate im not mod
I wish haha
But its ik your helping people dont stress
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16th March 2018, 03:13 PM |#7  
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Quote:
Originally Posted by panda968

Its ok mate im not mod
I wish haha
But its ik your helping people dont stress

Yeah I will not make this mistake next time tks for saying me that bro
16th March 2018, 03:17 PM |#8  
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Dont stress mate
As i said your helping as htc is very confusing with there firmware
16th March 2018, 03:34 PM |#9  
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Quote:
Originally Posted by panda968

Dont stress mate
As i said your helping as htc is very confusing with there firmware

Yeah I got no stress, hope someone who has troubles with Oreo and wants to go back to Nougat will downgrade successfully

Sent from my HTC U Ultra using XDA Labs
16th March 2018, 09:38 PM |#10  
paulpier007's Avatar
Member
Thanks Meter: 40
 
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Quote:
Originally Posted by lapaho

Our devices have been updated to Oreo by HTC, that was a good new since there are many reports and claims from the End Users that was an unstable update, so how to downgrade to a stable Nougat version, here is the way:

[IMPORTANT]
TESTED ON HTC U Ultra DUAL SIM (INDIA - SEA VERSION) and S-ON DEVICE ONLY with UNLOCKED BOOTLOADER, BUT THIS MIGHT WORK ON OTHER VARIANTS

I. PREPARATION
1. HTC Sync Manager for drivers: http://www.htc.com/us/software/htc-sync-manager/

2. ADB and Fastboot, u can use the latest version of Minimal ADB and Fastboot:
https://forum.xda-developers.com/sho....php?t=2317790 (thanks to @shimp208 for this great tool)

3. Stock Nougat RUU:
https://androidfilehost.com/?a=show&w=files&flid=164315 (thanks to @sardroid for RUUs uploading)
or for the tested device, this RUU has been used:
https://androidfilehost.com/?fid=962187416754465286 (thanks to @minhnewpro for uploading this)
or the latest 1.64.400.10 for Dual SEA - India I have just found
https://vnrom.net/2018/03/rom-stock-...ra-ocean-note/ (original link to support to the RUU publisher)

4. Latest version of TWRP recovery:
https://twrp.me/htc/htcuultra.html (thanks Team Win for this popular and useful TWRP)

5. The most important, HTC Version Tool:
https://drive.google.com/file/d/1ubj...b-YVkD4M7/view (thanks to @sabpprook for this super super great tool ^^ )

II. DOWNGRADING TO NOUGAT
1. Install HTC Sync Manager, ADB and Fastboot tool, extract HTC_Version_Tool.exe and copy it and twrp to your adb and fastboot folder
2. If your device's bootloader is unlocked, ignore this, if not
- go to https://www.htcdev.com/
- register for an account and then follow the site's instruction to unlock bootloader
3. Reboot your device into download mode and flash TWRP by opening cmd at your adb and fastboot folder and type:

Code:
fastboot devices
fastboot flash recovery twrp-3.2.1-1-oce.img
4. Boot device into Bootloader mode then boot to TWRP recovery
5. While your phone entered TWRP, open cmd, type:
Code:
adb devices
to check if your device is recognized
6. Once your device is recognized, open HTC_Version_Tool.exe
7. Type the version of the RUU that you are going to flash at new version line, for example, mine is 1.64.400.3 and press enter
8. Rename the RUU file to 2PZCIMG and REMEMBER TO KEEP .zip EXTENSION, then copy it to the root folder of SD Card (External SD Card is recommended)
9. Reboot your device into download mode, press Vol+, then press Power to start flashing 7.0 RUU
10. After flashing, your device can boot into Android but no signal or IMEI received, dont worry, continue these steps
11. Reboot into download mode, reflash TWRP, then boot to TWRP
12. At cmd windows, type
Code:
adb devices
adb shell
mke2fs -t ext4 /dev/block/bootdevice/by-name/persist
13. Reboot device to check if IMEI received
14. If IMEI received, you should reflash stock recovery from RUU.zip, but reflash the RUU is recommended.
If not, try to format the persist partition manually again
15. Done

And at last, I want to say big thanks to @sabpprook for helping me a lot to downgrade the device and @paulpier007 for HTC U11 downgrade method which gave me the idea for downgrading our U Ultra (https://forum.xda-developers.com/u11...ougat-t3754481)

Excellent guide .... this method is sure to go back without problems and does not need to be in S-OFF.
The Following User Says Thank You to paulpier007 For This Useful Post: [ View ] Gift paulpier007 Ad-Free
17th March 2018, 02:39 AM |#11  
OP Member
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Thanks Meter: 25
 
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Quote:
Originally Posted by paulpier007

Our devices have been updated to Oreo by HTC, that was a good new since there are many reports and claims from the End Users that was an unstable update, so how to downgrade to a stable Nougat version, here is the way:

[IMPORTANT]
TESTED ON HTC U Ultra DUAL SIM (INDIA - SEA VERSION) and S-ON DEVICE ONLY with UNLOCKED BOOTLOADER, BUT THIS MIGHT WORK ON OTHER VARIANTS

I. PREPARATION
1. HTC Sync Manager for drivers: http://www.htc.com/us/software/htc-sync-manager/

2. ADB and Fastboot, u can use the latest version of Minimal ADB and Fastboot:
https://forum.xda-developers.com/sho....php?t=2317790 (thanks to @shimp208 for this great tool)

3. Stock Nougat RUU:
https://androidfilehost.com/?a=show&w=files&flid=164315 (thanks to @sardroid for RUUs uploading)
or for the tested device, this RUU has been used:
https://androidfilehost.com/?fid=962187416754465286 (thanks to @minhnewpro for uploading this)
or the latest 1.64.400.10 for Dual SEA - India I have just found
https://vnrom.net/2018/03/rom-stock-...ra-ocean-note/ (original link to support to the RUU publisher)

4. Latest version of TWRP recovery:
https://twrp.me/htc/htcuultra.html (thanks Team Win for this popular and useful TWRP)

5. The most important, HTC Version Tool:
https://drive.google.com/file/d/1ubj...b-YVkD4M7/view (thanks to @sabpprook for this super super great tool ^^ )

II. DOWNGRADING TO NOUGAT
1. Install HTC Sync Manager, ADB and Fastboot tool, extract HTC_Version_Tool.exe and copy it and twrp to your adb and fastboot folder
2. If your device's bootloader is unlocked, ignore this, if not
- go to https://www.htcdev.com/
- register for an account and then follow the site's instruction to unlock bootloader
3. Reboot your device into download mode and flash TWRP by opening cmd at your adb and fastboot folder and type:

4. Boot device into Bootloader mode then boot to TWRP recovery
5. While your phone entered TWRP, open cmd, type:
to check if your device is recognized
6. Once your device is recognized, open HTC_Version_Tool.exe
7. Type the version of the RUU that you are going to flash at new version line, for example, mine is 1.64.400.3 and press enter
8. Rename the RUU file to 2PZCIMG and REMEMBER TO KEEP .zip EXTENSION, then copy it to the root folder of SD Card (External SD Card is recommended)
9. Reboot your device into download mode, press Vol+, then press Power to start flashing 7.0 RUU
10. After flashing, your device can boot into Android but no signal or IMEI received, dont worry, continue these steps
11. Reboot into download mode, reflash TWRP, then boot to TWRP
12. At cmd windows, type


Excellent guide .... this method is sure to go back without problems and does not need to be in S-OFF.

That got something as same as the method with U11 that u have posted

Sent from my HTC U Ultra using XDA Labs
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