I went to downgrade from marshmallow to lollipop 5.1.1 pb1 and I'm stuck in a bootloop is downgrading not possible or am I doing something wrong. installed the pb1 stock kernel as well after it kept bootlooping, though that shouldn't be necessary when installing a stock firmware. Any thoughts?
I feel like a complete noob, just did a factory reset and whiped the cache and I was up and running.
Downgrade path
What method did you use to downgrade back to 5.1.1? I am looking to downgrade so that i can root/unlock bootloader/ flash recovery/ install custom fw.
bsikes09 said:
What method did you use to downgrade back to 5.1.1? I am looking to downgrade so that i can root/unlock bootloader/ flash recovery/ install custom fw.
Click to expand...
Click to collapse
Just flash the older rom in odin.
I've also noticed that after unlocking the bootloader the sd card used can cause bootloops so make sure you take it out and format it after unlocking.
Related
I am stock rooted right now on 5.1 but want to update to Marshmallow.
What is the easiest method for this?
I did this method originally while on 5.1:
http://forum.xda-developers.com/one-m9/orig-development/recovery-twrp-touch-recovery-t3066720
I was going to restore my stock system backup in TWRP and then do the OTA and then do the above procedure again to obtain root.
I wasn't sure if I had to go through this same exact procedure again to go from root in 5.1 to root in Marshmallow or if things have changed.
TIA
maaavy said:
I am stock rooted right now on 5.1 but want to update to Marshmallow.
What is the easiest method for this?
I did this method originally while on 5.1:
http://forum.xda-developers.com/one-m9/orig-development/recovery-twrp-touch-recovery-t3066720
I was going to restore my stock system backup in TWRP and then do the OTA and then do the above procedure again to obtain root.
I wasn't sure if I had to go through this same exact procedure again to go from root in 5.1 to root in Marshmallow or if things have changed.
TIA
Click to expand...
Click to collapse
Just use the latest ruu. Doesn't wipe. Flash twrp and supersu afterwards to RE root
Sent from my HTC6545LVW using Tapatalk
In short, I have a SM-T800 on 4.4.2 stock. I have TWRP installed. The problem is the USB is out of order, it's just busted on hardware level, so I can't use ODIN or ADB or anything requiring USB.
Does there exist a way to flash the device upwards (maybe to 6.0.1) with only these tools available? I can't get OTA updates due to the custom recovery.
I've tried flashing with FlashFire a stock 5.0.2 firmware from samsung-updates, but FlashFire can't flash the bootloader, and the SM-T800 needs a bootloader upgrade to go over 4.4.2. The flash resulted in softbricking, but I've managed to return back to working 4.4.2.
Basically what I need (I would imagine) is a TWRP flashable package, which includes the bootloader.
Dorden said:
In short, I have a SM-T800 on 4.4.2 stock. I have TWRP installed. The problem is the USB is out of order, it's just busted on hardware level, so I can't use ODIN or ADB or anything requiring USB.
Does there exist a way to flash the device upwards (maybe to 6.0.1) with only these tools available? I can't get OTA updates due to the custom recovery.
I've tried flashing with FlashFire a stock 5.0.2 firmware from samsung-updates, but FlashFire can't flash the bootloader, and the SM-T800 needs a bootloader upgrade to go over 4.4.2. The flash resulted in softbricking, but I've managed to return back to working 4.4.2.
Basically what I need (I would imagine) is a TWRP flashable package, which includes the bootloader.
Click to expand...
Click to collapse
There is literally no way to flash the bootloader except by official means.
Kingroot is able to root most LL roms.
So if you go back to complete stock you can take the OTA and get the LL bootloader.
The thing I'm not sure about is if you will be offered the LL update or just the MM update.
Once you have the LL bootloader you will be able to root and install MM via FF.
ashyx said:
There is literally no way to flash the bootloader except by official means.
Kingroot is able to root most LL roms.
So if you go back to complete stock you can take the OTA and get the LL bootloader.
The thing I'm not sure about is if you will be offered the LL update or just the MM update.
Once you have the LL bootloader you will be able to root and install MM via FF.
Click to expand...
Click to collapse
Thanks, I'll have to go back to stock recovery then and see after if I can get rooted without USB after that, will see.
But how do you get back to stock if your on a custom room. I can't seem to get the right file to work. Everytime I try and extract and do it through Odin it fails
My M919 has MM on it. I want to unlock it. I downgrade the modem to MDL first.
It still working when MM using MDL modem.
Then I flash TMB-M919UVUFNB4-20140314115123 on it.
Now it's bootloop on the T-mobile screen.
My bootloader is FOK3 before I flash TMB-M919UVUFNB4-20140314115123.
Basically, I need it unlock and get my phone work.
please help.
Thank you.
EDIT, now I flash the M919UVUFOK3 and still bootloop.
I believe the phone must be running a stock rom before downgrading the modem.
audit13 said:
I believe the phone must be running a stock rom before downgrading the modem.
Click to expand...
Click to collapse
when i flash the M919UVUFNB4 and M919UVUFOK3, i think it would downgrade my modem to FNB4 and FOK3 respectively.
Are you going to unlock via code or regionlockaway? Unlock code requires a stock Samsung dialler. Regionlockaway requires a stock Samsung rom running the old modem and root.
If it's bootlooping, perform a factory wipe using stock recovery before booting the stock rom for the first time.
audit13 said:
Are you going to unlock via code or regionlockaway? Unlock code requires a stock Samsung dialler. Regionlockaway requires a stock Samsung rom running the old modem and root.
If it's bootlooping, perform a factory wipe using stock recovery before booting the stock rom for the first time.
Click to expand...
Click to collapse
unlock code need samsung dialer mean stock samsung rom, right?
anyway, when i tried to flash stock rom, it bootloop, I tried factory reset in Twrp. but it's not helping.
Wipe needs to be done with stock recovery.
audit13 said:
Wipe needs to be done with stock recovery.
Click to expand...
Click to collapse
could you tell me how?
so i flash the stock rom, then where do i look for stock recovery?
Flash stock rom then use the volume up and power to boot into recovery. Use the same method that is used to boot into twrp.
Hello
I was on 5.1.1(G920PVPU3BOJ7) and have root and twrp installed. I make nandroid backup and use odin to install stock android 6.0.1(G920PVPS4CPJ1). Now for some reason I want to go back to 5.1.1 but odin failed to install stock 5.1.1(SW REV CHECK FAIL DEVICE 4, BINARY 3) and also restoring backup using twrp stay in boot logo. It seems newer bootload does not allow downgrading.
Is there any solution?
Thanks in advance
I also tried downgrading to 5.1.1 from 6.0.1 through odin and was unsuccessful. I tried a few different 5.0\5.1 versions and they all failed as u mentioned. Someone has mentioned there is an anti-downgrade protection added to PI0 and newer.
I was able to flash an older modem from OJ7 using flash fire and it worked but that was just the modem I didnt go any farther trying to flash more parts from 5.1 firmware.using flash fire.
Flashing only modem is not enough. I want to completly back to 5.1.1 to be able unlock sim card.
Funny that u say that I was in the same boat. on PI3 and was trying the downgrade to unlock sim. I tried wondershare android sim unlock and unlockbase sim unlock software. both failed. I ended up coughing up the $35 to idoneapps and it worked first try and only takes a few minutes, pricey but super fast.
I updated to Q by flashing via fastboot. I am not happy with it. I tried to downgrade by flashing a stock image via fastboot but I get an error saying the wrong BL is installed. It's asking for an older version.
How can I flash this older version? Or, better yet, how can I flash a stock image or custom ROM of Android Pie without encountering an error?
I've searched and everything I tried from what I found still results in the version error.
If I remember correctly, you'll need to flash using the flash-all script so that it overwrites everything.
supaneko said:
I updated to Q by flashing via fastboot. I am not happy with it. I tried to downgrade by flashing a stock image via fastboot but I get an error saying the wrong BL is installed. It's asking for an older version.
How can I flash this older version? Or, better yet, how can I flash a stock image or custom ROM of Android Pie without encountering an error?
I've searched and everything I tried from what I found still results in the version error.
Click to expand...
Click to collapse
You can only downgrade with an unlocked bootloader. Downgrading without can brick your p3xl. After unlocking you can flash the 9.0 firmware and you won't have any bootloader or partition errors it will just work.