Hi my names Adrian.
I have a question about my I747. Can i downgrade my phone to oryginal firmware if i have now Android 4.4 CM 11,2. This mod based on I747UCDLK3 bootloader? If nothing bad happens to my phone if go back to stock? thanks for the reply.
You cannot flash a stock ROM that has a bootloader that is older than the bootloader currently installed on the phone.
Even flash by odin with PIT file? This method works on I9300.
Nope, can't be done with a pit file. Are you sure you can install a 4.1 bootloader over a 4.3 bootloader? I don't have the 9300 so I can't test.
Ok i understend. In 9300 not downgrade bootloader. I using 3-files ROM with new bootloader. This method allowed me back to stock from CM14.
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I am thinking to flash a 4.4 ROM on my S3 I747M. The only thing I am worried about the bootloader. If I flash the latest boot loader can I downgrade it?
Here a scenario
I am on 4.4 kitkat,with the latest bootloader,and I decide to go back to 4.2.2 with the latest bootloader. Is it possible to do that?
xXFl4sh said:
I am thinking to flash a 4.4 ROM on my S3 I747M. The only thing I am worried about the bootloader. If I flash the latest boot loader can I downgrade it?
Here a scenario
I am on 4.4 kitkat,with the latest bootloader,and I decide to go back to 4.2.2 with the latest bootloader. Is it possible to do that?
Click to expand...
Click to collapse
What carrier do you use? If AT&T is it the MJB bootloader.
You can check what bootloader you having using this - https://play.google.com/store/apps/details?id=org.freeandroidtools.root_checker
If you are on AT&T with the MJB bootloader you CANNOT downgrade the bootloader. It will brick the phone. My guess is that you could possible run a 4.2.2 ROM with the MJB bootloader. I have run 4.3 and 4.4 on the MG2 bootloader with no problem but haven't tried to run a 4.2.2 on the MJB bootloader. As long as the 4.2.2 ROM doesn't flash a bootloader, I would try it. But that's me. Just back sure to have a current backup. If there are any doubts about the 4.2.2 ROM flashing a bootloader, don't do it if on MJB.
xXFl4sh said:
I am thinking to flash a 4.4 ROM on my S3 I747M. The only thing I am worried about the bootloader. If I flash the latest boot loader can I downgrade it?
Here a scenario
I am on 4.4 kitkat,with the latest bootloader,and I decide to go back to 4.2.2 with the latest bootloader. Is it possible to do that?
Click to expand...
Click to collapse
most 4.3 aosp roms can run on the mjb bootloader but you have to modify the updater script to include it. but what the post says above if you try to downgrade the bootloader from mj2 ATT then it will brick the device
I have the MVLDLK4 bootloader. The only thing I am worried about is that there might be a few errors while using the ROM. I have tried about 3-4 4.2.2 ROMS but there is always 1 or 2 errors eg. Wifi does not work. Since there is only a few roms on 4.4+, i am worried I wont get a stable rom with minor error.
Cause If I update and the rom has errors, I have no backup rom.
I've got a Galaxy S3 I747 it is currently running 4.1.1, I747UCDLK3 Baseband. I'm not exactly a noob when it comes to flashing and rooting, I know my way around CWM and Odin pretty well. But I have a few questions on this 4.3 OTA. (I am a forum noob)
-Will I still be able to root? (I heard CF works for it)
-Can I install CWM? (Is the Bootloader locked??)
-Will I be be able to I flash other roms than the 4.3 TW like CM11Snapshot? (Is the bootloader locked?)
-What the h*ll is knox and why should I be worried?
-What is with the boot loader downgrading thing? (Have to do with locked bootloader??)
I AM NOT AT ALL WORRIED ABOUT A FLASH COUNTER OR VOIDING A WARRANTY I AM NOT ON A CONTRACT . I JUST DO NO WANT TO HARD BRICK MY PHONE.
If you take the OTA 4.3 update, it will install Knox and the 4.3 bootloader.
The 4.3 bootloader cannot be downgraded and attempts to do so will probably brick the phone.
You can root the stock 4.3 ROM with auto root but Knox may interfere with the process of cause issues after the fact.
You can still install CWM. I rrefer Philz Touch which is CWM-based.over TWRP.
So can I still flash roms?
Sent from my SAMSUNG-SGH-I747 using xda app-developers app
Yes, you can flash ROMs. Is your phone unlocked? Since you're on 4.1.1 stock, you can unlock it for free.
Personally, I avoided the 4.3 update because it installs knox and the 4.3 bootloader which can cause problems when using Odin to get back to stock.
I have a Canadian version of the s3 and I'm able to run KK ROMs with a stock 4.1.2 bootloader.
audit13 said:
Yes, you can flash ROMs. Is your phone unlocked? Since you're on 4.1.1 stock, you can unlock it for free.
Personally, I avoided the 4.3 update because it installs knox and the 4.3 bootloader which can cause problems when using Odin to get back to stock.
I have a Canadian version of the s3 and I'm able to run KK ROMs with a stock 4.1.2 bootloader.
Click to expand...
Click to collapse
Unlocked as in Bootloader? Yeah I've been able to flash roms via CWM and Odin on 4.1.1 and as in Carrier unlocked? Yes I use Straight Talk on this ATT S3
If I got the 4.3OTA I wouldn't need Odin to go back stock if I flashed a ROM would I? I could just make a back up via CWM then restore later if I wanted right rather than using ODIN?
See I can't use KK roms because I have the 4.1.1 BL so is there a way I can upgrade my boot loader to the 4.1.2 version??
Would I lose my carrier unlock if I upgraded to 4.3 or if I upgrade my bootloader??
I suggest downloading a ROM you want to try, then unzip the ROM and look at the updater script to see which bootloaders are supported. The updater-script file is located in \META-INF\com\google\android\updater-script. You can use a text editor to open the updater-script file.
The first few lines will list the bootloaders that are supported. I run Validus which is a KK ROM using a stock 4.1.2 i747m bootloader.
Do you know about this > "If I got the 4.3OTA I wouldn't need Odin to go back stock if I flashed a ROM would I? I could just make a back up via CWM then restore later if I wanted right rather than using ODIN?"
Also couldn't I just upgrade my Bootloader and Modem from here?
http://forum.xda-developers.com/showthread.php?t=2321310
http://forum.xda-developers.com/showthread.php?t=1831898
I feel like if I upgrade my boot loader then I won't have to worry about restrictions.
Would I lose my carrier unlock if I upgraded to 4.3 or if I upgrade just my bootloader??
I ended up flashing the MG2 Modem and Bootloader, I'm good now, also if I want 4.3 I saw loserskater has a leak version that will be good and wont not let me downgrade my bootloader.
Hi all i need some quick clarification,
1) I am full aware that if you purchased a Note 3 on 4.3 and you updated to stock via either OTA, Kies or Odin the bootloader is upgraded and you cannot downgrade to 4.3 stock.
2) So my question is if you are stock 4.4 and install root, install custom recovery, Can you still downgrade to a 4.3 rom via custom recovery? or will it not allow me to downgrade at all?
3) Finally You can't downgrade to a 4.3 bootloader correct?
1) correct
2) 4.3 kernels do not boot with the 4.4 bootloader, so no
3) correct
Sent from my leanKernel 2.2 powered stock 4.4.2 SM-N900T
If u have the w8 Canadian variant u can downgrade your bootloader.
thanks
toastido said:
1) correct
2) 4.3 kernels do not boot with the 4.4 bootloader, so no
3) correct
Sent from my leanKernel 2.2 powered stock 4.4.2 SM-N900T
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is 4.4.2 that bad for the n900t?
it seems people are trying to avoid upgrading the bootloader. and are trying to downgrade if already on kitkat. whats wrong with the kitkat bootloader?
Hello,
I have installed CyanogenMOD on my Samsung S3 (SGH- I747(AT&T)... Before installing CMOD i had Android 4.3...
Sinc 4.3 had lot of issues, i decided to root my device and installed CMOD....
Now I want to restock to my original ROM(AT&T I747 UCUEMJB Stock Restore).. How should I do it... Please help..
Is it advisable to download the original ROM from "samsung-updates.com" and simply flash it using ODIN..
Please advise
Do you have the 4.3 or newer bootloader on your phone? If you do, do not flash any ROMs that try to downgrade your bootloader. Attempts to downgrade from your current bootloader could brick the phone.
This might help if you're on a stock 4.3 bootloader: This might help: http://forum.xda-developers.com/showthread.php?t=2722660
If you have the 4.1.1 or 4.1.2 bootloader, you can flash a stock ROM via Odin and OTA to 4.3.
I had to update to ND3 Kitkat bootloader in order to install Dr ketan's 4.4.2 V12 Rom. I still find my old 4.1.2 is much more faster and stable so I wanted to flash stock firmware but I couldn't because of the bootloader. So my question is, is it possible to downgrade the bootloader so I can use 4.1.2 again, flash mj5? If not are there things that I could try? Will there be a modified kitkat bootloader than I can install so I can downgrade?
Thanks
EmperorRedPanda said:
I had to update to ND3 Kitkat bootloader in order to install Dr ketan's 4.4.2 V12 Rom. I still find my old 4.1.2 is much more faster and stable so I wanted to flash stock firmware but I couldn't because of the bootloader. So my question is, is it possible to downgrade the bootloader so I can use 4.1.2 again, flash mj5? If not are there things that I could try? Will there be a modified kitkat bootloader than I can install so I can downgrade?
Thanks
Click to expand...
Click to collapse
Bootloader can't be downgraded. Flashing older bootloader might brick your phone.
With Mobile Odin Pro some people have successfully downgraded to 4.1.2, but bootloader remains intact.
Sent from my GT-N7100 using Tapatalk
EmperorRedPanda said:
I had to update to ND3 Kitkat bootloader in order to install Dr ketan's 4.4.2 V12 Rom. I still find my old 4.1.2 is much more faster and stable so I wanted to flash stock firmware but I couldn't because of the bootloader. So my question is, is it possible to downgrade the bootloader so I can use 4.1.2 again, flash mj5? If not are there things that I could try? Will there be a modified kitkat bootloader than I can install so I can downgrade?
Thanks
Click to expand...
Click to collapse
Doing it with software you may need hundreds of dollars worth of JTAG equipment with no guaranteed result. The cheapest and the most direct way is to have a repair shop to swap out the phone's EMMC, which should be under $100. Specifically state you want 4.1.2 and tell them NOT to upgrade the bootloader or ROM to 4.3 or later.