Downgrade with Sideload? - Google Pixel 4 XL Questions & Answers

Is there a way to modify a factory image in other force install through Sideload? Bootloader is locked(unlocking is not an option)
Edit; I mean an older factory image in order to downgrade

LexPanda said:
Is there a way to modify a factory image in other force install through Sideload? Bootloader is locked(unlocking is not an option)
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Click to collapse
You can sideload an OTA with a locked bootloader.

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[SOLVED] SuperSU and Re-root on 4.4.2

Hey everyone
I've recently solved my OTA problem (seen here) but I soon discovered yet another problem.
When I tried to enter SuperSU, I received the following error shown below.
As mentioned before, I'm on 4.4.2 and I have NO desire whatsoever to unlock my bootloader all over again. Is there anyway to re-root my phone without unlocking my bootloader or will I need to do just that in order to re-root?
Thanks in advance
Anyone?
Please help :crying:
ArmyMan007 said:
Please help :crying:
Click to expand...
Click to collapse
From what I know, and by the error displayed on the attached screenshot, you need to do the whole rutine all over again. I am pretty sure rooting can not be done if bootloader is locked, which might mean you have a stock recovery image as well - and since that is not keen to be rooted (as far as I know) you need to flash a custom recovery like twrp. I might be wrong in all this, I'm newish to all this.
ArmyMan007 said:
Hey everyone
I've recently solved my OTA problem (seen here) but I soon discovered yet another problem.
When I tried to enter SuperSU, I received the following error shown below.
As mentioned before, I'm on 4.4.2 and I have NO desire whatsoever to unlock my bootloader all over again. Is there anyway to re-root my phone without unlocking my bootloader or will I need to do just that in order to re-root?
Thanks in advance
Click to expand...
Click to collapse
Since you are S-ON you can not flash a custom recovery or root without unlocking your bootloader.
Frogger209 said:
From what I know, and by the error displayed on the attached screenshot, you need to do the whole rutine all over again. I am pretty sure rooting can not be done if bootloader is locked, which might mean you have a stock recovery image as well - and since that is not keen to be rooted (as far as I know) you need to flash a custom recovery like twrp. I might be wrong in all this, I'm newish to all this.
Click to expand...
Click to collapse
Well, for starters, my bootloader is unlocked (as mentioned before), thus we eliminate the bootloader unlocking dilemma. But it still doesn't tell me how can I re-root my device: you want to tell me that I have to do is to flash a custom recovery and install SuperSU again, and my phone will be rooted again?
majmoz said:
Since you are S-ON you can not flash a custom recovery or root without unlocking your bootloader.
Click to expand...
Click to collapse
Like I wrote before: I DO have an unlocked bootloader
ArmyMan007 said:
Well, for starters, my bootloader is unlocked (as mentioned before), thus we eliminate the bootloader unlocking dilemma. But it still doesn't tell me how can I re-root my device: you want to tell me that I have to do is to flash a custom recovery and install SuperSU again, and my phone will be rooted again?
Click to expand...
Click to collapse
flash twrp 2.6.3.3. boot in recovery then exit, twrp will prompt you to root the phone. Then yo ucan flash back the stock recovery for future ota updates.
alray said:
flash twrp 2.6.3.3. boot in recovery then exit, twrp will prompt you to root the phone. Then yo ucan flash back the stock recovery for future ota updates.
Click to expand...
Click to collapse
Why can't I flash twrp 2.7.1.0? and don't I need to install SuperSU via twrp? and what do you mean that twrp will promote me to root the phone? it never did that before..
ArmyMan007 said:
Why can't I flash twrp 2.7.1.0?
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Click to collapse
latest known bug free version of twrp is 2.6.3.3/.4 thats why we always recommend using this version.
and don't I need to install SuperSU via twrp? and what do you mean that twrp will promote me to root the phone? it never did that before..
Click to expand...
Click to collapse
that is for the M8 but same thing apply for the M7:
http://www.youtube.com/watch?v=bKGKlkJRroQ#t=122
or flash the latest su binary from twrp
alray said:
latest known bug free version of twrp is 2.6.3.3/.4 thats why we always recommend using this version.
that is for the M8 but same thing apply for the M7:
http://www.youtube.com/watch?v=bKGKlkJRroQ#t=122
or flash the latest su binary from twrp
Click to expand...
Click to collapse
I used to install the latest binary within twrp and it never asked me to do so. Now I got root access again Can I flash my stock recovery again?
ArmyMan007 said:
I used to install the latest binary within twrp and it never asked me to do so. Now I got root access again Can I flash my stock recovery again?
Click to expand...
Click to collapse
yes you can flash your stock recovery again, might be a good idea to do a nandroid backup of your current config before flashing back the stock recovery.
Code:
fastboot flash recovery name_of_recovery.img
fastboot erase cache
fastboot reboot
alray said:
yes you can flash your stock recovery again, might be a good idea to do a nandroid backup of your current config before flashing back the stock recovery.
Code:
fastboot flash recovery name_of_recovery.img
fastboot erase cache
fastboot reboot
Click to expand...
Click to collapse
Will do! Thanks a bunch!!!

Error on installing ota 5.0.2 on Nexus 7

I got a NExus 7 wifi 2012 that was running 5.0. It was rooted, and used TWRP.
I got info about the updated and pressed install. Booted in to TWRP and nothing happened. I then pressed install in TWRP and in cache found the .zip and tried to install. Got an error.
I then booted in to android again, and flashed the stock recovery 5.0.2 (I guess it's like the stock 5.0?) and later I tried the OTA install again. Got an error.
I then read about the new "feature" in 5.0 about not allowing OTA if rooted, and I then in SuperSU completely uninstall the root and rebooted.
Later when I got the OTA update again, I thought it should work, but I still got the error.
What can I do? Right now I'm on a MAC. Can I in some way flash only the good stuff from the factory image, and in some way NOT have to factory reset the Nexus 7?
/Söder
Even when you unroot, your file system is tampered. Only way to update is using factory images.
I think you can flash the factory image without user data to prevent factory reset.
theliquid said:
Even when you unroot, your file system is tampered. Only way to update is using factory images.
I think you can flash the factory image without user data to prevent factory reset.
Click to expand...
Click to collapse
How is it I do that then? What files from the factory images (unpacked) is it that I need to flash? Is it fastboot or ADB I use to flash?
/Söder
soder said:
How is it I do that then? What files from the factory images (unpacked) is it that I need to flash? Is it fastboot or ADB I use to flash?
/Söder
Click to expand...
Click to collapse
I have done this with my rooted N5 and N7. You need to re-flash system.
Unpack the 5.0 factory image and
fastboot flash system system.img
goraps said:
I have done this with my rooted N5 and N7. You need to re-flash system.
Unpack the 5.0 factory image and
fastboot flash system system.img
Click to expand...
Click to collapse
I managed to do this now to. My biggest problem is now to root the device again. I've switched back to stock recovery, before I removes root, when I was trying to apply the ota.
Now when I try to flash twrp recovery, I get an error about the size. I can flash the stock recovery though, the same way I flashed system.img and boot.img.
What can be wrong? I do I get root now again?
/Söder
/Söder
soder said:
I managed to do this now to. My biggest problem is now to root the device again. I've switched back to stock recovery, before I removes root, when I was trying to apply the ota.
Now when I try to flash twrp recovery, I get an error about the size. I can flash the stock recovery though, the same way I flashed system.img and boot.img.
What can be wrong? I do I get root now again?
/Söder
/Söder
Click to expand...
Click to collapse
Are you saying you can't flash the TWRP recovery now? So are you now completely stock 5.0.2?
goraps said:
Are you saying you can't flash the TWRP recovery now? So are you now completely stock 5.0.2?
Click to expand...
Click to collapse
Yes, system, boot, recovery flashed with fastboot.
When in fastboot mode, I get error, something with size, when flashing twrp. I found a CWM recovery I could flash, but it didn't boot to recovery correctly.
The twrp file is not corrupt. Tried it again and also a different version.
/Söder
OMG. I'm so f-ing stupid. Blaming all the x-mas food.
Was trying to flash the Oneplus One recovery. Not the one for Nexus 7.
Hope it works better now...
/Söder

New firmware update VNS-L31C432B383

Hi. I'm on b381 and now I received by OTA the b383
http://oi65.tinypic.com/2je8wlg.jpg
I'm not able to install It.
I have elite kernel 10.1 and twrp. I extracted recovery and boot from b381 and flashed them by fastboot but the ota failed. Why? What can I do? If i flash the full ota the bootloader Will lock and unlocking It start automatcly a factory reset. Anyone Can help me?
Paolo83 said:
I'm not able to install It.
I have elite kernel 10.1 and twrp. I extracted recovery and boot from b381 and flashed them by fastboot but the ota failed. Why? What can I do? If i flash the full ota the bootloader Will lock and unlocking It start automatcly a factory reset. Anyone Can help me?
Click to expand...
Click to collapse
no, the only way to install them is to not modify the system in any way

OTA update over Magisk? What's gonna happen?

If I have a P9 on Nougat B391, I receive an OTA, am currently rooted on Magisk v14. If I install the OTA anyway? What will happen? I know I will lose root, but will my bootloader be relocked? Am I going to lose any data?
Would like to know what will happen next as I am thinking of installing it. thanks!
there are 2 posible outcomes, maybe 3.
1. update will be successfull and you will lose root, twrp, bootloader can be locked too, but on fastboot it will shown as unlocked, if you cant instal twrp, then you need to unlock bootloader even if there is tuped unlocked.
2. update will fail and you will be back on same build you was.
3. never hapened to me, but are possible, that phone got bricked!
Arnys said:
there are 2 posible outcomes, maybe 3.
1. update will be successfull and you will lose root, twrp, bootloader can be locked too, but on fastboot it will shown as unlocked, if you cant instal twrp, then you need to unlock bootloader even if there is tuped unlocked.
2. update will fail and you will be back on same build you was.
3. never hapened to me, but are possible, that phone got bricked!
Click to expand...
Click to collapse
IMO, (2) is most possible utcome. (3) may happen if you force DLOAD and other manual methods.
Better:
1) unroot by Magisk Uninstaller, find the download link in the post https://forum.xda-developers.com/showpost.php?p=74913863&postcount=1
2) flash from TWRP original stock boot img
3) wipe Dalwik and Cache from TWRP
3) flash from fastboot original stock recovery
4) let it make OTA update but select in the System Update settings to use Full (not differential) update - it will not delete your apps and settings
Of course, you will loose root and TWRP but bootloader will remain unlocked and you will not risk bricking the phone.
Arnys said:
there are 2 posible outcomes, maybe 3.
1. update will be successfull and you will lose root, twrp, bootloader can be locked too, but on fastboot it will shown as unlocked, if you cant instal twrp, then you need to unlock bootloader even if there is tuped unlocked.
2. update will fail and you will be back on same build you was.
3. never hapened to me, but are possible, that phone got bricked!
Click to expand...
Click to collapse
thanks, this roughly gives me an idea on what would happen and the risks it contains! thanks a lot!
zgfg said:
IMO, (2) is most possible utcome. (3) may happen if you force DLOAD and other manual methods.
Better:
1) unroot by Magisk Uninstaller, find the download link in the post https://forum.xda-developers.com/showpost.php?p=74913863&postcount=1
2) flash from TWRP original stock boot img
3) wipe Dalwik and Cache from TWRP
3) flash from fastboot original stock recovery
4) let it make OTA update but select in the System Update settings to use Full (not differential) update - it will not delete your apps and settings
Of course, you will loose root and TWRP but bootloader will remain unlocked and you will not risk bricking the phone.
Click to expand...
Click to collapse
thanks a lot! it's useful to know how to unroot my phone as there isn't any particular guide for this phone model haha. anyway, is there a way to unroot and lock my bootloader without wiping my phone?
roottree said:
thanks a lot! it's useful to know how to unroot my phone as there isn't any particular guide for this phone model haha. anyway, is there a way to unroot and lock my bootloader without wiping my phone?
Click to expand...
Click to collapse
Magisk Uninstaller does not wipe your phone.
However, unlocking or relocking Bootloader (from Fastboot) triggers Factory restore

Correct way to lock the bootloader?

What is the correct steps to factory reset and lock the boot loader.
I don't want to brick the P5.
I am trading in the P5 and I am second guessing myself on the step for this method.
Use the Android Flash Tool. It's foolproof and gives you the option to relock the bootloader and wipe data.
To manually lock the bootloader, reboot to bootloader, and use ADB:
fastboot flashing lock
If you intend to manually flash the factory image via ADB, make sure this is the LAST thing you do.
V0latyle said:
Use the Android Flash Tool. It's foolproof and gives you the option to relock the bootloader and wipe data.
To manually lock the bootloader, reboot to bootloader, and use ADB:
fastboot flashing lock
If you intend to manually flash the factory image via ADB, make sure this is the LAST thing you do.
Click to expand...
Click to collapse
Kool, I did not know that the flash tool would do this.
vandyman said:
Kool, I did not know that the flash tool would do this.
Click to expand...
Click to collapse
Yep. You can force flash all partitions too, as well as disable verity and verification. It's honestly the easiest way to factory flash.

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