Develop Bugs

Rollback from 4.3 to 4.12 or Earlier Stock ROM

Now that 4.3 stock ROM is out, has anyone developed a method to roll back to previous JB stock ROM's?
From what I read, once you update the bootloader, you cannot go back. But surely one of our great developers has/will come up with a method.
Thanks

OKAstro said:
Now that 4.3 stock ROM is out, has anyone developed a method to roll back to previous JB stock ROM's?
From what I read, once you update the bootloader, you cannot go back. But surely one of our great developers has/will come up with a method.
Thanks
Click to expand...
Click to collapse
Would like to know when this comes out too. From what I know it hasn't been done yet. I'm constantly advised to flash a 4.3 ROM if I want to go back to stock but the current 4.3 ROM is way too buggy.

OKAstro said:
Now that 4.3 stock ROM is out, has anyone developed a method to roll back to previous JB stock ROM's?
From what I read, once you update the bootloader, you cannot go back. But surely one of our great developers has/will come up with a method.
Thanks
Click to expand...
Click to collapse
You can flash any rom you like as long as it does not contain a BOOTLOADER for further clarification look here ---> http://forum.xda-developers.com/showpost.php?p=48211488&postcount=3

scotteb said:
You can flash any rom you like as long as it does not contain a BOOTLOADER for further clarification look here ---> http://forum.xda-developers.com/showpost.php?p=48211488&postcount=3
Click to expand...
Click to collapse
Thanks. So is the "not able to rollback" only related to the bootloader itself? And after upgrading to 4.3 with MJB bootloader, we can return to 4.12 as long as we don 't flash a 4.12 ROM with a bootloader?
Sorry for the questions, but for some reason my brain and the whole bootloader deal is a no-go

scotteb said:
You can flash any rom you like as long as it does not contain a BOOTLOADER for further clarification look here ---> http://forum.xda-developers.com/showpost.php?p=48211488&postcount=3
Click to expand...
Click to collapse
Can anybody confirm that if we are on 4.3 stock, and install CWM and non-stock ROM (CM, PA, etc.), will the warranty check flag change to 0x1 in download mode? Or will it remain at 0x0?

trini_vibezzz said:
Can anybody confirm that if we are on 4.3 stock, and install CWM and non-stock ROM (CM, PA, etc.), will the warranty check flag change to 0x1 in download mode? Or will it remain at 0x0?
Click to expand...
Click to collapse
It will trip the flag if you flash a recovery. If you're worried about it tripping, don't flash anything. Mine tripped rooting stock with CF-Root. Not a big deal though, only two months left on the contract.

OKAstro said:
Thanks. So is the "not able to rollback" only related to the bootloader itself? And after upgrading to 4.3 with MJB bootloader, we can return to 4.12 as long as we don 't flash a 4.12 ROM with a bootloader?
Sorry for the questions, but for some reason my brain and the whole bootloader deal is a no-go
Click to expand...
Click to collapse
You are correct!! no bootloader and your good to go!!

So...what does flashing the MJB bootloader provide that the MJ2 bootloader doesn't provide?

OKAstro said:
So...what does flashing the MJB bootloader provide that the MJ2 bootloader doesn't provide?
Click to expand...
Click to collapse
From what I have read wifi won't work without it.

I tried
I flash a 4.2.2 stock rom after OTA updating to 4.3 with a mobile odin. But the baseband and imei became unknown after I boot the phone. So I have to flash back to 4.3 again....LOL

I was able to flash to UCMG2 stock after what I will dub my 4.3 OTA fiasco lol I flashed it in TWRP using the download from this thread http://forum.xda-developers.com/showthread.php?t=2388065
I did not need to flash any other item as everything appears to be functioning well.

[Q] how do i revert back to MDL from MK2

so im trying to get my Galaxy S4 to 100% stock for return and its not working. i flashed the factory image but the baseband is till MK2. how do i get it to MDL? i never took the OTA update and just flashed the the MK2 modem.

This be in q&a and you should have read first, but to answer your question, you can't. There no going backwards on firmware

jd1639 said:
This be in q&a and you should have read first, but to answer your question, you can't. There no going backwards on firmware
Click to expand...
Click to collapse
i did not update the firmware just the modem.

homeislove said:
i did not update the firmware just the modem.
Click to expand...
Click to collapse
Can you find a mdl modern zip. Flash that in your custom recovery.

jd1639 said:
Can you find a mdl modern zip. Flash that in your custom recovery.
Click to expand...
Click to collapse
i cannot seem to find one. i have stock recovery at the moment. i thought i had to use odin to flash modems

i got it to MLD. i just took the Modem.bin from factory image and then used odin to flash it.

homeislove said:
i cannot seem to find one. i have stock recovery at the moment. i thought i had to use odin to flash modems
Click to expand...
Click to collapse
Answered in your other thread in Q/A.

Downgrading from 4.4.x to 4.3

I was wondering if I may run into any problems by doing this.
I know that on an AT&T phone (i747), if you do that, you may lose your modem and needs to be reflashed (you get a null IMEI)
Is it the same on a SGH-T999? I was planning to flash this ROM:
http://www.sammobile.com/firmwares/3/?download=26636
Thanks

There is no 4.4.2 to downgrade from for the T999.
If you just have a 4.4.2 Rom, you don't need to do anything.
The firmware you linked is the latest available so you can flash it regardless of what you have now.

There is no 4.4.2 update for the T999 so yes you can flash it but it is not a ROM, it is firmware, please do not confuse these two they are very different!

Yeah... I'm afraid I am confused. What I did was to flash this:
http://forum.xda-developers.com/showthread.php?t=2690947
Isn't that a ROM?
However I would like to go back to 4.3, so I was just wondering if I could have any problems.
Sorry for the noob questions. I think it was clear to me, but I'm afraid it's not...
Thanks

Yes that is a rom, what you linked to in the first post is firmware which contains more than just the system and that is where you run into problems when downgrading

serio22 said:
Yes that is a rom, what you linked to in the first post is firmware which contains more than just the system and that is where you run into problems when downgrading
Click to expand...
Click to collapse
So if I'm on 4.4.4 right now, is there a way to go back to 4.3?

_LEM_ said:
So if I'm on 4.4.4 right now, is there a way to go back to 4.3?
Click to expand...
Click to collapse
Yes, flash the link you provided in the first post or flash a 4.3 rom.. Understand this, flashing a rom will not determine if you can downgrade or not, flashing firmware will. Since there is no 4.4 firmware for the T999 you can still flash the 4.3 firmware. If there was a 4.4 firmware and you took the OTA or updated via Odin then the only thing you could do is flash a 4.3 rom, firmware will not be an option
Edit: oh and btw I accidently pressed the thanks button so you got a free one

serio22 said:
Yes, flash the link you provided in the first post or flash a 4.3 rom.. Understand this, flashing a rom will not determine if you can downgrade or not, flashing firmware will. Since there is no 4.4 firmware for the T999 you can still flash the 4.3 firmware. If there was a 4.4 firmware and you took the OTA or updated via Odin then the only thing you could do is flash a 4.3 rom, firmware will not be an option
Edit: oh and btw I accidently pressed the thanks button so you got a free one
Click to expand...
Click to collapse
Thanks. I understand better now. I have always been kind of confused between ROMs and firmwares.
PS: I triple thanked you.

IMEI Null/Null, Baseband Unknown

I've researched all day on this, flashed stock rom and recovery again, and nothing. Phone is out of warranty obviously.
My IMEI is showing null/null and the baseband is unknown. I've flashed stock, rooted, tried restoring the efs folder, and nothing has worked. Phone worked just fine yesterday/this morning. Any suggestions?
In my efs folder, there is no NV_DATA.BIN file either.
Any help? TIA.

1) download just the modem from this thread http://forum.xda-developers.com/show....php?t=2252932
2) connect phone to pc
3) copy zip over (do not un zip)
4) reboot to recovery
5) install zip
try this it worked for me

What bootloader is on your phone? Flashing the a modem onto your phone that is not compatible with your bootloader can brick your phone. For example, flashing a 4.4.2 modem onto a 4.3 bootloader will hard brick your phone.
http://forum.xda-developers.com/galaxy-s3-att/general/modem-4-4-2-modems-i747-i747m-t2856577

imevilbob said:
1) download just the modem from this thread http://forum.xda-developers.com/show....php?t=2252932
2) connect phone to pc
3) copy zip over (do not un zip)
4) reboot to recovery
5) install zip
try this it worked for me
Click to expand...
Click to collapse
That link is broken, but yup, I already tried that.
audit13 said:
What bootloader is on your phone? Flashing the a modem onto your phone that is not compatible with your bootloader can brick your phone. For example, flashing a 4.4.2 modem onto a 4.3 bootloader will hard brick your phone.
http://forum.xda-developers.com/galaxy-s3-att/general/modem-4-4-2-modems-i747-i747m-t2856577
Click to expand...
Click to collapse
I'm on the 4.3 bootloader and 4.3 Stock ROM.

Do you have a mjb modem on your phone?

Yes, I do.

If the baseband is unknown, how do you know you have the mjb modem on your phone?
Maybe you need to re-flash the 4.3 mjb modem. If that doesn't resolve the issue, you could try injecting the imei using nvwriter.
http://forum.xda-developers.com/showthread.php?t=1804117

audit13 said:
If the baseband is unknown, how do you know you have the mjb modem on your phone?
Well, that's what I flashed. Maybe I flashed incorrectly, I'll flash again.
Maybe you need to re-flash the 4.3 mjb modem. If that doesn't resolve the issue, you could try injecting the imei using nvwriter.
10-4.
http://forum.xda-developers.com/showthread.php?t=1804117
Click to expand...
Click to collapse
Bold.

Good luck. Report back with your results.
Thanks.

Reflashing didn't work.
Trying the instructions, I'm getting stuck at step 2. When I dial that code, I get this screen:
and when trying to select the other option, the button highlights blue, and then goes back to how it was before.

What are you using to flash the modem? Which file are you flashing? Are you sure you are on a completely stock ROM with a stock dialler?

audit13 said:
What are you using to flash the modem? Which file are you flashing? Are you sure you are on a completely stock ROM with a stock dialler?
Click to expand...
Click to collapse
The latest CWM.
File name is: modem_CWM_I747UCUEMJB
Yes, completely stock ROM. Just flashed through Odin.

I747 said:
The latest CWM.
File name is: modem_CWM_I747UCUEMJB
Yes, completely stock ROM. Just flashed through Odin.
Click to expand...
Click to collapse
You flashed the 4.3 stock ROM via Odin? Where did you get the file? It must have been a custom compilation because AT&T never released 4.3 as a full ROM, only as an OTA.

audit13 said:
You flashed the 4.3 stock ROM via Odin? Where did you get the file? It must have been a custom compilation because AT&T never released 4.3 as a full ROM, only as an OTA.
Click to expand...
Click to collapse
I believe I downloaded the .tar from here, let me see if I can find the link.

I got the .tar here
http://forum.xda-developers.com/showpost.php?p=53563728&postcount=322

I assume that tar.md5 file has the necessary modem but I don't know for sure since I used to have the i747m, not the i747.
Maybe this will help with flashing just the modem: http://forum.xda-developers.com/showthread.php?t=2540998

Hey there I747! I can help you solve your problem I believe! If you want I can walk you thru the steps to fix this issue! Let me know if your interested! Just PM me a message and we can do it over Hangouts or something! Will probably take about an hour.

audit13 said:
I assume that tar.md5 file has the necessary modem but I don't know for sure since I used to have the i747m, not the i747.
Maybe this will help with flashing just the modem: http://forum.xda-developers.com/showthread.php?t=2540998
Click to expand...
Click to collapse
Flashed it from that thread, still a no go.

I747 said:
Flashed it from that thread, still a no go.
Click to expand...
Click to collapse
I have what you need. ..and a slight change to your flashing procedure should solve your issues. I am assuming you're on at&t right? Let me know and will post how to fix it. Please post your model number and carrier

KaosMaster said:
I have what you need. ..and a slight change to your flashing procedure should solve your issues. I am assuming you're on at&t right? Let me know and will post how to fix it. Please post your model number and carrier
Click to expand...
Click to collapse
Yup, on AT&T. SGH-I747.

reverting to 4.1.1

i have the s3 att on a 4.4.4 CROM. the baseband says ...LK3. can i use any guide using odin to go back to 4.1.1 stock unrooted and then use OTA updates to get the latest baseband/bootloader/modem? just want to make sure before i do it. i hear this is the safest way and i want to make sure i have met the requirements before i do it so i dont end up having a brick! (not sure if it matters but i have never used OTA updates before)
thanks in advance.

Is your bootloader also the lk3? If the modem and bootloader are lk3, you can use Odin to flash back to stock using firmware from sammobile.com.

Ok, I'm on a similar boat. I tried several AOSP based ROMs, and while I like most of them a lot more than stock touchwiz, they all present the same problems:
- Camera stops working sometimes and I have to reboot device;
- Camera won't record videos in 1080p, even when it's selected in the settings;
- Cannot make video calls on Skype longer than 5 seconds before the call drops;
- Disconnecting a bluetooth media device while music is streaming causes sounds to stop working;
- Tap to pay doesn't work at all;
So because of these problems, I want to go back to stock . My phone is the AT&T version. Currently I'm running Carbon Rom with KitKat 444. The baseband version is I747UCUFNJ1. The latest version of the stock ROM available on sammobile is:
Version: Android 4.1.1
PDA: I747UCDLK3
CSC: I747ATTDLK3
MODEM: I747UCDLK3
Would I be able to revert my phone back to stock with Odin? If not, what would I have to do to revert? Am I stuck with custom ROMs?
I'm pretty new to this so I'd appreciate anybody's help.

If your bootloader and modem is the lk3, you should be able to Odin back to stock 4.1.1.

Ok, how do I find out if they are? And if they are not, do I have any other options?

Download and install the Samsung Info App from the Playstore. Report back here with your bootloader and modem.

audit13 said:
Download and install the Samsung Info App from the Playstore. Report back here with your bootloader and modem.
Click to expand...
Click to collapse
Ok, according to the Phone INFO *Samsung* app:
Baseband Version:
I747UCUFNJ1
Bootloader Version:
I747UCUFNJ1
There was no other modem info reported besides this
Modem Board:
MSM8960

someone correct me if i'm wrong.you cannot downgrade bootloader or it will brick. there is no stock rom for NJ1. this link will take you to a stock based 4.4.2 ROM which is safe to flash with the NJ1 bootloader/modem.
http://forum.xda-developers.com/showthread.php?t=2848080
"all i can really do , is stay out of my own way and let the will of heaven be done"

mrrocketdog said:
someone correct me if i'm wrong.you cannot downgrade bootloader or it will brick. there is no stock rom for NJ1. this link will take you to a stock based 4.4.2 ROM which is safe to flash with the NJ1 bootloader/modem.
http://forum.xda-developers.com/showthread.php?t=2848080
Click to expand...
Click to collapse
Well, that's a bummer if I can't restore stock rom to the phone. So there is absolutely no way of safely downgrading the booatloader?

nope. it will brick your phone if you try to downgrade your bootloader.
"all i can really do , is stay out of my own way and let the will of heaven be done"

Have you tried CM-11-based or TW-based ROMs?

mrrocketdog said:
someone correct me if i'm wrong.you cannot downgrade bootloader or it will brick. there is no stock rom for NJ1. this link will take you to a stock based 4.4.2 ROM which is safe to flash with the NJ1 bootloader/modem.
http://forum.xda-developers.com/showthread.php?t=2848080
Click to expand...
Click to collapse
I tried to push that ROM the phone using adb to flash it with ClockWorkMod, but the file is 1.7 GB and the phone always shuts itself down during the push process... So I wasn't able to try that. Also, the instructions say you're supposed to be on UCUFNE4. Are you sure it's safe to flash it on I747UCUFNJ1?
audit13 said:
Have you tried CM-11-based or TW-based ROMs?
Click to expand...
Click to collapse
I have tried CM11 and Carbon ROM, which is CM based, both have all the same problems. I haven't tried TW-based ROMS. Do you have any suggestions?

What do you mean by the phone shuts down? Did you try copying the ROM to a microSD card?
Did you notice any bootloader or modem files in the S3Rx 4.0 (11-9-14) ROM? It may not include a modem or bootloader. In step 1 of the flash process, it says "AT&T I747 users should update bootloaders and modem to NE4 http://forum.xda-developers.com/gala...pdate-t2808654 I747M and T999 users need to be on 4.3 firmware or ROM will not boot. "

the link i posted is TW. post #1306 claims is o.k. to flash with UFNJ1.
did not see any mention of bootloader or modem in changelog or in list of 'extra' features.
"all i can really do , is stay out of my own way and let the will of heaven be done"

audit13 said:
What do you mean by the phone shuts down? Did you try copying the ROM to a microSD card?
Did you notice any bootloader or modem files in the S3Rx 4.0 (11-9-14) ROM? It may not include a modem or bootloader. In step 1 of the flash process, it says "AT&T I747 users should update bootloaders and modem to NE4 http://forum.xda-developers.com/gala...pdate-t2808654 I747M and T999 users need to be on 4.3 firmware or ROM will not boot. "
Click to expand...
Click to collapse
I reboot the phone in ClockWorkMod recovery. Then I go to the command prompt and type:
Code:
adb push S3Rx_UCUFNE4_AROMA_11-9-14.zip /sdcard/
It starts pushing the file to the phone, but after a while, the phone screen goes black, and I get a "Protocol failure" on the command prompt. After this the power button no longer works, I have to do a battery pull for the phone to work again. The phone has 10 GB of storage left so it didn't run out of space. The USB chord is brand new so I don't think it's that either. It worked fine before when I pushed other smaller roms.
In another question, would this process allow me to downgrade the modem and restore stock rom?
http://forum.xda-developers.com/showthread.php?t=1831898

i am pretty sure that since youre on MJ1 , your bootloader and modem have to match.
"all i can really do , is stay out of my own way and let the will of heaven be done"

Did you try flashing the card from an external microSD card?
AT&T never released a stock ROM for the i747 beyond 4.1.1 afaik; therefore, you cannot get back to stock unless you flash an OTA ROM that has been compiled for flashing in Odin.
I do not recommend mixing and matching bootloaders and modems as a mismatch may result in a hard brick.
Downgrading only the modem will not allow you to flash back to stock.

audit13 said:
Did you try flashing the card from an external microSD card?
Click to expand...
Click to collapse
I haven't tried flashing from external microSD card as I don't have one.
audit13 said:
AT&T never released a stock ROM for the i747 beyond 4.1.1 afaik; therefore, you cannot get back to stock unless you flash an OTA ROM that has been compiled for flashing in Odin.
I do not recommend mixing and matching bootloaders and modems as a mismatch may result in a hard brick.
Downgrading only the modem will not allow you to flash back to stock.
Click to expand...
Click to collapse
So you're basically telling me I'm stuck with custom roms unless I find a 4.4.2 OTA ROM I can flash with Odin (which doesn't appear to exist)?
---------- Post added at 05:24 PM ---------- Previous post was at 05:01 PM ----------
Would it be safe to try this:
http://forum.xda-developers.com/showthread.php?t=2788357
Even though I'm on I747UCUFNJ1 and not on I747UCUFNE4?

Once you upgrade to the 4.3 or newer bootloader on the i747, you are stuck with either custom ROMs or OTA ROMs that have been compiled for flashing in Odin or CWM/TWRP.
You can try flashing the NE4 ROM because it doesn't appear to include a bootloader or modem. The first post says "Prerequisites include a minimum of a 4.3 bootloader and modem.
If you are not on the official 4.4.2 bootloaders and modem then you will need to flash ktoonsez kernel."

Thanks audit13 and mrrocketdog for all the help. I was able to get the AROMA rom installed on the phone. All functionalities lost with AOSP ROMs are back working so that's a plus. Still can't get updates OTA updates but this phone is probably not gonna have any new ones. Still hopeful that lolipop based AOSP ROMs fix the problems I had, but I'm not holding my breath.