Related
Background: I had updated to OA1 4.4.4 on s5 900A. I had some issues, so I decided to downgrade as described in the upgrade thread here: http://forum.xda-developers.com/att...to-root-g900aucu2aoa1-4-4-4-2-3-2015-t3021120.
I would downgrade by flashing in odin the G900A_Downgrade_to_NCE.tar, as well as the G900A_ND3_Stock_Kernel, rerooting with towelroot, installing safestrap, and flashing one of the many 4.4.2 roms.
However, upon boot all of the 4.4.2 roms would be laggy, I would sometimes get a green/pixilated effect on the lockscreen when unlocking, and battery life would be sub par. I came across this app on play store:https://play.google.com/store/apps/details?id=org.vndnguyen.phoneinfo&hl=en , and even though I had downgraded the kernel, the bootloader read as OA1, even after flashing in Odin the ND3 stock kernel.
I believed that was causing the issues I was having, and was under the impression that the bootloader could not be downgraded. In a fit of frustration I did the following, and fixed the problem!
Solution:
This is not a step by step, but a rough approximation of what I did, if you need more detail, just ask.
1. I downloaded and put on my SD card G900A_NCE_to_NG3_OTA.zip https://www.androidfilehost.com/?fid=95916177934525665
2. In odin 3.09 I flashed G900A_Downgrade_to_NCE.tar https://www.androidfilehost.com/?fid=23622183712464416,
3. Also in the AP slot I flashed G900A_ND3_Stock_Kernel https://www.androidfilehost.com/?fid=23622183712464356
3. My phone was unrooted at this time. I let it boot up, downloaded the Phone INFO ★Samsung★ to the phone from the playstore, opened and my bootloader remained OA1. The camera was normal, and the boot was slow, so I was where I was many times before.
4. I shut down the phone, I rebooted holding volume up, power and start until I got to the standard, built in samsung recovery.
5. I located my download of G900A_NCE_to_NG3_OTA.zip, and flashed it via the samsung recovery. It took about 5 minutes.
6. The phone rebooted, and the phone info app said I had and NG3 baseband! It had downgraded! However, towel root was not compatible.
7. I flashed in odin G900A_ND3_Stock_Kernel again. Now towelroot rooted the phone. I installed busybox and superuser from the playstore, then safestrap again.
Now I can flash any of the 4.4.2 roms, none of the slowbooting, stuttering lockscreen or battery issues seem to be present, and Phone INFO ★Samsung★ has my baseband and bootloader as NG3.
All credit goes to muniz_ri, these are all his tools! I just stumbled across this method and thought others might benefit.
I can confirm this.
I was on OA1 after flashing OA1 OTA zip from recovery.
Later, I downgraded by flashing G900A_Downgrade_to_NCE.tar. Bootloader after this was OA1.
Flashed G900A_NCE_to_NG3_OTA.zip from recovery. Bootloader and baseband changed to NG3.
Bootloader and Baseband version was verified using 'phone info' app from play store.
yoonus said:
I can confirm this.
I was on OA1 after flashing OA1 OTA zip from recovery.
Later, I downgraded by flashing G900A_Downgrade_to_NCE.tar. Bootloader after this was OA1.
Flashed G900A_NCE_to_NG3_OTA.zip from recovery. Bootloader and baseband changed to NG3.
Bootloader and Baseband version was verified using 'phone info' app from play store.
Click to expand...
Click to collapse
does that ota have to be used if your on stock nce? im running alliance rom right now... also can it be flashed in SS?
iamthedj said:
does that ota have to be used if your on stock nce? im running alliance rom right now... also can it be flashed in SS?
Click to expand...
Click to collapse
I think it can be flashed only from stock ROM. This is stock OTA.
yoonus said:
I think it can be flashed only from stock ROM. This is stock OTA.
Click to expand...
Click to collapse
forgot i had a stock nce rooted backup so just started from there flashed the ota in sammy recovery and bam back to the old bootloader thanks a bunch man much appreciated
I think I will give this a try in the next few days. I'm on the rooted 5.0 by muniz_ri and I love Lollipop but I miss being able to flash custom roms.
MetalHead66 said:
I think I will give this a try in the next few days. I'm on the rooted 5.0 by muniz_ri and I love Lollipop but I miss being able to flash custom roms.
Click to expand...
Click to collapse
Likewise, just did it, I found with me, the OTA zip file would not install with the ND3 kernel installed. So I did the original odin downgrade to NCE, booted, then the OTA zip file, booted, Then the ND3 kernel Tar file in odin. Worked .Good luck:good:
so the nce to ng3 downgrade goes in the ap or BL?
Vortex_User said:
so the nce to ng3 downgrade goes in the ap or BL?
Click to expand...
Click to collapse
NCE. to NG3. OTA zip is done in original recovery by pressing power + volume up + home key. Then install update from Sd external.
i fixed my phone with this!
thanks!!!!!!!
maxirn05 said:
i fixed my phone with this!
thanks!!!!!!!
Click to expand...
Click to collapse
+1
was on Muniz 5.0, downgraded to xtreme dynamic kitkat. Still had oa1 bootloader, and was laggin really bad on boot.
Flashed this in stock recovery (wipes data part ) and reloaded my apps.
All seems to be well, without the need to go back to stock in between.
Thank you - this totally worked for me and got rid of the lag in my 4.4.2 ROM (XDK) as I had taken the upgrade to 4.4.4 way back when!
Hi,
do you do step 2 & 3 at the same time?
which field in Odin do you put the .tar file?
Thanks,
h
dave812 said:
Background: I had updated to OA1 4.4.4 on s5 900A. I had some issues, so I decided to downgrade as described in the upgrade thread here: http://forum.xda-developers.com/att...to-root-g900aucu2aoa1-4-4-4-2-3-2015-t3021120.
I would downgrade by flashing in odin the G900A_Downgrade_to_NCE.tar, as well as the G900A_ND3_Stock_Kernel, rerooting with towelroot, installing safestrap, and flashing one of the many 4.4.2 roms.
However, upon boot all of the 4.4.2 roms would be laggy, I would sometimes get a green/pixilated effect on the lockscreen when unlocking, and battery life would be sub par. I came across this app on play store:https://play.google.com/store/apps/details?id=org.vndnguyen.phoneinfo&hl=en , and even though I had downgraded the kernel, the bootloader read as OA1, even after flashing in Odin the ND3 stock kernel.
I believed that was causing the issues I was having, and was under the impression that the bootloader could not be downgraded. In a fit of frustration I did the following, and fixed the problem!
Solution:
This is not a step by step, but a rough approximation of what I did, if you need more detail, just ask.
1. I downloaded and put on my SD card G900A_NCE_to_NG3_OTA.zip https://www.androidfilehost.com/?fid=95916177934525665
2. In odin 3.09 I flashed G900A_Downgrade_to_NCE.tar https://www.androidfilehost.com/?fid=23622183712464416,
3. Also in the AP slot I flashed G900A_ND3_Stock_Kernel https://www.androidfilehost.com/?fid=23622183712464356
3. My phone was unrooted at this time. I let it boot up, downloaded the Phone INFO ★Samsung★ to the phone from the playstore, opened and my bootloader remained OA1. The camera was normal, and the boot was slow, so I was where I was many times before.
4. I shut down the phone, I rebooted holding volume up, power and start until I got to the standard, built in samsung recovery.
5. I located my download of G900A_NCE_to_NG3_OTA.zip, and flashed it via the samsung recovery. It took about 5 minutes.
6. The phone rebooted, and the phone info app said I had and NG3 baseband! It had downgraded! However, towel root was not compatible.
7. I flashed in odin G900A_ND3_Stock_Kernel again. Now towelroot rooted the phone. I installed busybox and superuser from the playstore, then safestrap again.
Now I can flash any of the 4.4.2 roms, none of the slowbooting, stuttering lockscreen or battery issues seem to be present, and Phone INFO ★Samsung★ has my baseband and bootloader as NG3.
All credit goes to muniz_ri, these are all his tools! I just stumbled across this method and thought others might benefit.
Click to expand...
Click to collapse
hegel22 said:
Hi,
do you do step 2 & 3 at the same time?
which field in Odin do you put the .tar file?
Thanks,
h
Click to expand...
Click to collapse
Do step 2 and 3 separate. Use the ap slot for both
dirtydodge said:
Do step 2 and 3 separate. Use the ap slot for both
Click to expand...
Click to collapse
After i update G900A_NCE_to_NG3_OTA from sd card while rebooting i get samsung account locked. Each time i enter the correct samsung account and password it displays processing failed. What should i do??? please help
Praveenshrestha1991 said:
After i update G900A_NCE_to_NG3_OTA from sd card while rebooting i get samsung account locked. Each time i enter the correct samsung account and password it displays processing failed. What should i do??? please help
Click to expand...
Click to collapse
I'm not sure. Sounds like the reactivation was locked before you downgraded. I'm not sure how to fix that.
Okay so i was going to install the rooted Lollipop but now the phone is stuck on the custom with unlocked lock screen after deleting the system and data to install but instead of installing i hit reboot and now i dont know what to do?? how do i get back into Safestrap recovery or is there another way to install the rooted Lollipop rom or even put back my 4.4.4 rooted rom?
I did the same thing. If you managed to install the 5.0 boot loader you're ****ed(I did). But if you haven't you can flash back to 4.4.2 using Odin to regain use of the device. Search the forum for the .tar. I'd link you but I'm on mobile.
thatbigmoose said:
I did the same thing. If you managed to install the 5.0 boot loader you're ****ed(I did). But if you haven't you can flash back to 4.4.2 using Odin to regain use of the device. Search the forum for the .tar. I'd link you but I'm on mobile.
Click to expand...
Click to collapse
No i did not install anything. I deleted my data, system, cache on the phone. I did backup all my data on my SD card on my computer so I do have the backup but I dont know how to restore to that backup without going into Safestrap. I can only get into download mode. I was on the OTA 1 rooted 4.4.4.
http://forum.xda-developers.com/att...to-root-g900aucu2aoa1-4-4-4-2-3-2015-t3021120
Downgrade to NCE Tar, flash in ODIN(download mode)
I am guessing I will have to install SM-G900A 4.4.2 G900AUCU1ANCE Firmware.rar via Odian and start from fresh??
EDIT:
Is this what i am looking for, G900A_Downgrade_to_NCE.rar just flash this in Odin?
G900A_Downgrade_to_NCE.rar
Input the extracted file into AP in ODIN and flash away. You will then be on NCE 4.4.2. Allow the OTA to NG3 then follow the steps to downgrade the Kernel to ND3 to allow root with Towelroot. Flash back up to NG3 Kernel. Install SU, Busybox and Safestrap. Then you can do the method to install the rooted backup image for 5.0.
Okay so i am installing G900A_Downgrade_to_NCE.rar now. After its done would i have to root and install safestrap and then install the rooted Lollipop via safestrap? or is there a quicker way?
Nucleartx said:
G900A_Downgrade_to_NCE.rar
Input the extracted file into AP in ODIN and flash away. You will then be on NCE 4.4.2. Allow the OTA to NG3 then follow the steps to downgrade the Kernel to ND3 to allow root with Towelroot. Flash back up to NG3 Kernel. Install SU, Busybox and Safestrap. Then you can do the method to install the rooted backup image for 5.0.
Click to expand...
Click to collapse
You are quck. Thank you so much!!
I am on 4.4.2 now. Would i take the OTA via software updates?
EDIT: I am taking the OTA update (162.40mb) then i will downgrade the kernal to ND3 then Towelroot then flash back NG3 kernal
Okay I installed the rooted Lollipop rom. I think i skipped a few things. The out come is:
Device status: Custom
Android version: 5.0
Baseband version: G900AUCU3BOC4
Kernal version: 3.4.0-4432708
[email protected] #1
Mon Mar 16 20:46:33 KST 2015
Build number: LRX21T.G900AUCU3BOC4
Now seeing what I can uninstall safetly and restore some of my apps and settings back.
Thank you!!
davidalindsey said:
Okay I installed the rooted Lollipop rom. I think i skipped a few things. The out come is:
Device status: Custom
Andriod version: 5.0
Baseband version: G900AUCU3BOC4
Kernal version: 3.4.0-4432708
[email protected] #1
Mon Mar 16 20:46:33 KST 2015
Build number: LRX21T.G900AUCU3BOC4
Now seeing what I can uninstall safetly and restore some of my apps and settings back.
Thank you!!
Click to expand...
Click to collapse
Hey guys help my, i was on 5.0 then tried to downgrade. Now i get a fail message when i try to flash anything on odin. Is there a 5.0 Ap i could try flashing? I have no safestrap or root so i cant flash zip files.
Thanks in advance
I was running stock rooted Lollipop ....Wanted to try out a new rom so when I tried to reboot to TWRP nothing happened...So I decided to just reflash TWRP via Odin and it failed...tried to reflash cf auto root via Odin and failed. I was able to flash the NK4 firmware via Odin. And same fail message came up for Cf Auto Root and TWRP...Went to check recovery and I'm back to stock. Tried doing a factory reset in stock recovery and failed...preload destination does not exist! Fudge bananas! So I flashed the firmware (OC6). It's working fine but I can not use Cf Auto root nor flash TWRP via Odin....Any ideas what's going on?
re: flashing issues
jutaejrtouch said:
I was running stock rooted Lollipop ....Wanted to try out a new rom so when I tried to reboot to TWRP nothing happened...So I decided to just reflash TWRP via Odin and it failed...tried to reflash cf auto root via Odin and failed. I was able to flash the NK4 firmware via Odin. And same fail message came up for Cf Auto Root and TWRP...Went to check recovery and I'm back to stock. Tried doing a factory reset in stock recovery and failed...preload destination does not exist! Fudge bananas! So I flashed the firmware (OC6). It's working fine but I can not use Cf Auto root nor flash TWRP via Odin....Any ideas what's going on?
Click to expand...
Click to collapse
Perhaps you don't have the latest versions of cf-autroot. odin and twrp recovery.
The latest versions are twrp v2.8.6.0, odin v3.10.0 and cf-autoroot.
Both twrp and cf-autoroot are specifically for the N910T Tmobile Note 4.
Here is a direct download link to the latest versions:
https://www.dropbox.com/s/i25yjb1o97o96nb/CF-Autoroot & TWRP v2.8.6.0 and ODIN3 v3.10.0.zip?dl=0
p.s. Be sure to use the original Note 4 charging cable.
Good luck!
Misterjunky said:
Perhaps you don't have the latest versions of cf-autroot. odin and twrp recovery.
The latest versions are twrp v2.8.6.0, odin v3.10.0 and cf-autoroot.
Both twrp and cf-autoroot are specifically for the N910T Tmobile Note 4.
Here is a direct download link to the latest versions:
https://www.dropbox.com/s/i25yjb1o97o96nb/CF-Autoroot & TWRP v2.8.6.0 and ODIN3 v3.10.0.zip?dl=0
p.s. Be sure to use the original Note 4 charging cable.
Good luck!
Click to expand...
Click to collapse
I'm using the same files as I did Monday when I initially went to Lollipop on Monday. I was on stock rooted Lollipop.
I can flash firmwares without errors, it's cf auto root and twrp that fail.
re: cf autoroot and twrp issues
jutaejrtouch said:
I can flash firmwares without errors, it's cf auto root and twrp that fail.
Click to expand...
Click to collapse
I just looked at your two screen shots and noticed that your activation
lock is ON, so go into settings>security and turn it OFF.
Then power off the phone and go into download
mode and start odin flashing cf-autoroot and twrp.
Good luck!
Your lock ? is defintley your issue. I still using twrp 2.8.4 with no issues and odin 3.9.
BAD ASS NOTE 4
Misterjunky said:
I just looked at your two screen shots and noticed that your activation
lock is ON, so go into settings>security and turn it OFF.
Then power off the phone and go into download
mode and start odin flashing cf-autoroot and twrp.
Good luck!
Click to expand...
Click to collapse
Geez that sounds right. Forgot I turned that on when installed Lollipop. Can't wait till I get home to change that back. Thanks my friend!
Thanks
Home from work and I ran to my computer! That''s exactly what was wrong. I'm rooted again and flashed TWRP with no issues. Thanks again guys!
I rooted with ping pong root, followed these guides to do my "OTA" updates:
http://forum.xda-developers.com/att-galaxy-s6/general/g920aucu2aof3-flashfire-update-t3156221
http://forum.xda-developers.com/att-galaxy-s6/general/g920aucu2aof3-to-of4-flashfire-update-t3181135
Then I used this file with Odin, to factory reset:
http://forum.xda-developers.com/att-galaxy-s6/general/odin-tar-files-sm-g920a-t3103835
Now it seems to have factory reset it but it says I have no IMEI, network unknown, etc....
I am suspecting that its something to do with those updates I did and flashing the Modem drivers, which maybe need to be downgraded now? or if i can update my software somehow with a legit version?
Any help is greatly appreciated.
Gavin
To my understanding, the downgrade to OE2 from OE3 or OF4 causes these issues with the imei and such.
Sent from my SAMSUNG-SM-G920A using Tapatalk
from what I have gathered... seems right.
so I am thinking now if I can upgrade to OE3, or OF4 in a legit way... then my modem will work again....
but If i use the upgrades mentioned on those 2 threads, those are pre rooted? so ill just be rooted again (but working modem)
correct?
My files are working fine. the problem is that you're trying to keep root and the modem you flashed is NOT compatible with the bootloader you current have.
Sunderwear, no problem with your files at all, I think the problem is with me.
I am trying to remove root.
How can I put a bootloader on my device that will be compatible with my modem?
I had the same issues. I ended up using Odin to go to OCE, then OE2 then I used PPR to root, and used FF to go to OF3 then OF4. Cause a BUNCH of problemt so I went to BBuy and had them force a flash of the full OF4.
You could always try doing the Odin OI2 files and see if that leaves you fully updated with everything working. You will lose root and will not be able to downgrade.
Well, depending on your desired outcome (rootless OF4, or 5.1.1), you'll have to do slightly different things, both will wipe your phone completely.
To move to rootless OF4, just download the Full OTA from the bottom of the first post at this link this is where things get different.
The next step is to reboot your device to recovery, not download mode (hold power home and vol up). You may see a updating android icon, but nothing should be happening yet.
You should now see the manual menu for the recovery, select the sideload update option
On your computer with ADB, sideload the OTA zip Do not unplug your phone
Your phone should reboot and you're now running OF4 while rootless
For 5.1.1
Flash the ODIN files with ODIN
Please note, you must be already rooted for this to work: I made the same mistake of upgrading to of4. Here's what I did, and my phone works just awesome and is still rooted with the Of4 base band.
1. Odin 3.10.6 OCE2
2. Reboot, at this point you'll have no carrier signal/data.
3. Ping pong root, install flash fire.
4. Install Rayman's ROM, Clean ROM, or Dennis ROM with flashfire (wipe first!).
5. Download the of4 root update here. forum.xda-developers.com/att-galaxy-s6/general/g920aucu2aof3-to-of4-flashfire-update-t3181135 ONTO YOUR PC. unrar. Flash via Odin the two files you unrar'd according to these instructions:
In Odin put boot.tar.md5 in the AP slot.
Put modem.tar.md5 in the CP slot.
Leave all other settings alone and click start.
Reboot, and you should be up and running with cell data and carrier signal.
dave812 said:
Please note, you must be already rooted for this to work: I made the same mistake of upgrading to of4. Here's what I did, and my phone works just awesome and is still rooted with the Of4 base band.
1. Odin 3.10.6 OCE2
2. Reboot, at this point you'll have no carrier signal/data.
3. Ping pong root, install flash fire.
4. Install Rayman's ROM, Clean ROM, or Dennis ROM with flashfire (wipe first!).
5. Download the of4 root update here. forum.xda-developers.com/att-galaxy-s6/general/g920aucu2aof3-to-of4-flashfire-update-t3181135 ONTO YOUR PC. unrar. Flash via Odin the two files you unrar'd according to these instructions:
In Odin put boot.tar.md5 in the AP slot.
Put modem.tar.md5 in the CP slot.
Leave all other settings alone and click start.
Reboot, and you should be up and running with cell data and carrier signal.
Click to expand...
Click to collapse
Worked like a charm thxs
I have a S5 Active that was rooted on 5.0 and I tried to unroot through SU and factory restore. Now im stuck at the at&t logo. I've downloaded just about every file and tried upgrading to 5.1.1 downgrading and nothing works. I know this is a long shot but is there anything i can do?
edit- tried flashing bootloader MD5 but odin keeps failing. Recovery says LRX21T.G870AUCU1BOC5
objection23 said:
I have a S5 Active that was rooted on 5.0 and I tried to unroot through SU and factory restore. Now im stuck at the at&t logo. I've downloaded just about every file and tried upgrading to 5.1.1 downgrading and nothing works. I know this is a long shot but is there anything i can do?
Click to expand...
Click to collapse
When that happened to me, I used muniz's methods to fix my G870A. Here's the link:
http://www.droidviews.com/update-att-galaxy-s5-active-to-lollipop-root-it-and-enable-wifi-tethering/
Before doing anything, try flashing the bootloader MD5 file using Odin, that could be the problem. If that doesn't work,go ahead and download the STOCK firmware for the G870A and flash it. This will take you back to 4.4.2 KK, but you can easily use muniz's method after that to get either rooted or unrooted Lollipop. Good luck!