Develop Bugs

Downgrade 4.3 to 4.2.2

How do I downgrade 4.3 to 4.2.2? 4.3 has alot of problems, wifi keeps dropping. I am using Rochester Institute of Technologys internet. How would I do that?
Thanks
Tmobile Galaxy s4, m919

I don't think you can due to knox.
With the newer MK2 bootloader and knox people seem to report bricks when attepting.
You might want to root, flash the older modems and see if that makes a difference.
I ran a 4.3 custom rom with 4.2 modems and bootloader without issues for the most part.

TheArtiszan said:
I don't think you can due to knox.
With the newer MK2 bootloader and knox people seem to report bricks when attepting.
You might want to root, flash the older modems and see if that makes a difference.
I ran a 4.3 custom rom with 4.2 modems and bootloader without issues for the most part.
Click to expand...
Click to collapse
What about the backup? I made a backup via TWRP something. Would it work?

It should.
Sent from my SGH-M919 using XDA Premium 4 mobile app

Android_Monsters said:
It should.
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
How would I do that? I don't have root and custom recovery.

re: down grade
RanbirS said:
How would I do that? I don't have root and custom recovery.
Click to expand...
Click to collapse
You need to go to http://SamMobile.com and download the
official stock M919 MDL firmware for your phone.
After doing that go into recovery mode and do a factory reset.
Once that's done you need to Odin flash the stock MDL firmware.
After doing that your phone will be 4.2.2 stock.
It will need to be re-rooted if you want root access and you will also need
to flash the custom cwm/twrp recovery if you want.
Good luck!

Misterjunky said:
You need to go to http://SamMobile.com and download the
official stock M919 MDL firmware for your phone.
After doing that go into recovery mode and do a factory reset.
Once that's done you need to Odin flash the stock MDL firmware.
After doing that your phone will be 4.2.2 stock.
It will need to be re-rooted if you want root access and you will also need
to flash the custom cwm/twrp recovery if you want.
Good luck!
Click to expand...
Click to collapse
When I tried to flash the stock rom, it got fused. now what?

Go into recovery and wipe data
Sent from my SGH-M919 using XDA Premium 4 mobile app

Android_Monsters said:
Go into recovery and wipe data
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
I got it. It's all good now.
All I did was, Root it, then flash CR, then flash MDL bootloader. Then restored it.

RanbirS, did you have stock 4.3 when you restored back to 4.22?
Thanks

my replacement phone came with 4.3 and its not letting me flash the the official 4.2.2 fw. any thoughts?
---------- Post added at 04:28 PM ---------- Previous post was at 04:14 PM ----------
i tried flashing the 4.2.2 official tar with odin and apparently have brisked the phone. It now wants me to connect it to kies but its not doing anything. :/

gamepr said:
my replacement phone came with 4.3 and its not letting me flash the the official 4.2.2 fw. any thoughts?
---------- Post added at 04:28 PM ---------- Previous post was at 04:14 PM ----------
i tried flashing the 4.2.2 official tar with odin and apparently have brisked the phone. It now wants me to connect it to kies but its not doing anything. :/
Click to expand...
Click to collapse
Guess you didn't see all the posts about not able to downgrade.
Can you still get into download mode? Try Odin the stock 4.3 firmware.
☞ Sent from here☜???

baseballfanz said:
Guess you didn't see all the posts about not able to downgrade.
Can you still get into download mode? Try Odin the stock 4.3 firmware.
☞ Sent from here☜???
Click to expand...
Click to collapse
Hey, thanks for suggesting this. It worked!

I can't make OTA work again after rooting my I9500 (now on 4.3) and would like to return back to Official firmware is it possible to downgrade first to 4.2 or any suggestion?

gil2004xp said:
I can't make OTA work again after rooting my I9500 (now on 4.3) and would like to return back to Official firmware is it possible to downgrade first to 4.2 or any suggestion?
Click to expand...
Click to collapse
As for your root problem, try asking this in the i9500 specific forum. Our devices are sufficiently different that what works for ours won't work for yours.
As far as downgrading, you're probably out of luck like every other S4 owner in existence.
Sent from my SGH-M919 using XDA Premium 4 mobile app

lordcheeto03 said:
As for your root problem, try asking this in the i9500 specific forum. Our devices are sufficiently different that what works for ours won't work for yours.
As far as downgrading, you're probably out of luck like every other S4 owner in existence.
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
i was able to downgrade from the latest 4.4.4 to 4.2.2 using a bst. . but now my wifi doesnt work . ha ha

aago1254 said:
i was able to downgrade from the latest 4.4.4 to 4.2.2 using a bst. . but now my wifi doesnt work . ha ha
Click to expand...
Click to collapse
You had my curiosity, but now you have my attention. Not knowing what exactly a bst is, I'd like to know how KNOX liked that. Did it downgrade everything; bootloader, modems, etc? Were you able to fix your WiFi?

lordcheeto03 said:
You had my curiosity, but now you have my attention. Not knowing what exactly a bst is, I'd like to know how KNOX liked that. Did it downgrade everything; bootloader, modems, etc? Were you able to fix your WiFi?
Click to expand...
Click to collapse
yes it downgraded the bootloader, the modem didnt take though, the bst dongle is a phone service box. and it allowed the downgrade. i was able to get the wireless back after i upgraded to the next firmware version. i dont have the s4 any more but i wanted to try it because everyone said it could not be done. and i did it. with a service box.

aago1254 said:
yes it downgraded the bootloader, the modem didnt take though, the bst dongle is a phone service box. and it allowed the downgrade. i was able to get the wireless back after i upgraded to the next firmware version. i dont have the s4 any more but i wanted to try it because everyone said it could not be done. and i did it. with a service box.
Click to expand...
Click to collapse
I've been searching for this dongle but I think is only available for the i9500, not for the T-Mobile M919.

[Q] Galaxy S3 downgrade from android 4.3 to 4.1.2

I have a T-Mobile Samsung Galaxy S3 (SGH-T999) and I made the mistake of allowing an upgrade??? to android 4.3 which has been very unstable for me. T-Mobile, Samsung, and Google all say that there are no updates to 4.3 and I can’t downgrade, so basically I’m out of luck.
Can I downgrade 4.3 to 4.1.2 without bricking my phone and hopefully without voiding my warranty? If so, please give me some instructions. I downloaded Odin 3.07 and firmware: root66_TMO_T999UVDMD5.7z. Thanks a million.

I don't think it's possible to downgrade anymore due to Knox. There was a thread talking about it
Maybe you should check it out.
Sent from my C6916

You cannot downgrade without voiding your warranty
Sent from my SGH-T999 using Tapatalk

Dont flash md5root66 after update!
newbee123 said:
I have a T-Mobile Samsung Galaxy S3 (SGH-T999) and I made the mistake of allowing an upgrade??? to android 4.3 which has been very unstable for me. T-Mobile, Samsung, and Google all say that there are no updates to 4.3 and I can’t downgrade, so basically I’m out of luck.
Can I downgrade 4.3 to 4.1.2 without bricking my phone and hopefully without voiding my warranty? If so, please give me some instructions. I downloaded Odin 3.07 and firmware: root66_TMO_T999UVDMD5.7z. Thanks a million.
Click to expand...
Click to collapse
if you flash the root66 of the md5 firmware via odin after you have already upgraded to 4.3 you will HARD BRICK your phone. Taking the 4.3 ota updates your bootloader and flashing anything other than 4.3 in odin will wreck your life.
You need to download the root66mjc firmware here:
http://www.androidfilehost.com/?fid=23212708291682181
And flash it in odin. Then from there install a custom recovery and download a rom of your choosing and the compatible modem. I recommend you download the md5 modem. Then you're gonna wanna boot into recovery and flash the rom and the modem only (kernels are ok of course) JUST NO BOOTLOADERS. I don't even know if you can do that in recovery but trying to mess with the new BL will brick your face I mean phone.

full steps?
so does anyone have any full list of steps and links on where to get the modems and all to downgrade 4.3 with knox down to 4.1.2

pamma83 said:
so does anyone have any full list of steps and links on where to get the modems and all to downgrade 4.3 with knox down to 4.1.2
Click to expand...
Click to collapse
Would you try reading the thread before posting ? Its not that long. You will see your answer provided by 3 different individuals.

Perseus71 said:
Would you try reading the thread before posting ? Its not that long. You will see your answer provided by 3 different individuals.
Click to expand...
Click to collapse
this thread had 4 posts before i posted and only 1 talks about what to do..where are you seeing 3 different people saying what to do and how???
and i asked where to get the modems and all.. do you see anyone saying where to get them??

pamma83 said:
this thread had 4 posts before i posted and only 1 talks about what to do..where are you seeing 3 different people saying what to do and how???
and i asked where to get the modems and all.. do you see anyone saying where to get them??
Click to expand...
Click to collapse
I was referring to the 3 persons who responded to the OP's question similar to yours. @jtl_777's response is pointing to the 4.3 Firmware.

Its more implied in this thread than stated matter of factly. This thread is several months old, and I know your question has been asked countless times in many different threads, much more recently than in this one.
I suggest you read the stickies in each section. Just by doing that you will find all firmware and modems and more. You will also find that the answer is no, you cannot downgrade your full firmware from 4.3. And you never will be able to.
If your having problems I suggest flashing the latest 4.3 build via Odin, then factory resetting. Start over clean with minimal restoring of backups (only the essentials).
Every time an update comes out there are people who have problems. The majority are solved by doing what I just said because most bugs are caused by using old data created by old apps on the new build.
Even if you could downgrade, chances are youd run into even more issues and still have to factory reset.
Sent from my SGH-T999 using Tapatalk

DocHoliday77 said:
... You will also find that the answer is no, you cannot downgrade your full firmware from 4.3. And you never will be able to.
Click to expand...
Click to collapse
thanks but I read online and some youtube videos showing that people have gone from 4.3 back to 4.1.2, just trying to make the phone the way it was before any updates were done and wondering if anyone knows the proper steps without bricking the phone.

They probably just flashed a rom. It is simply not possible to downgrade the firmware though.
Sent from my SGH-T999 using Tapatalk

so i found this post: http://forum.xda-developers.com/showpost.php?p=48758977&postcount=1412 and i have the same case as Christopher4tw with a stock 4.3 T999UVUEMJC and just want to get back to T999UVDMD5 so its running the 4.1.2 version of android
so do i just download the below file, extract and flash via odin then do a wipe via recovery? If not can you please explain how to go about this so i can have 4.1.2 running on the phone
April 2013 - 4.1.2 JellyBean
Note: This is based off of the stock image TMO T999UVDMD5
Perm Mirror: Download - root66_TMO_T999UVDMD5.7z

You cannot downgrade your firmware.
Flash an older rom with cwm or twrp if you need to be running md5
Sent from my SGH-T999 using Tapatalk

DocHoliday77 said:
You cannot downgrade your firmware.
Flash an older rom with cwm or twrp if you need to be running md5
Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
so can I use this http://forum.xda-developers.com/showthread.php?t=2276645 and flash via cwm or twrp recovery and it will make the phone run 4.1.2 without bricking or having issues with knox or does that have the bootloader issue with it as well?

Yes, that one you can flash.
Sent from my SGH-T999 using Tapatalk

DocHoliday77 said:
Yes, that one you can flash.
Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
great thanks so much for your help, can I flash the recovery via odin mobile app or is it safer to do it via pc?

Safer via PC.
It is possible via Mobile Odin. But that's one of the partitions I don't want to mess with when Phone is Booted/

If you know how to use Mobile Odin then it should be fine. I agree that its better to use pc odin if youre not familiar with Mobile Odin. However, it actually doesnt flash the recovery while booted. It flashes the flash kernel which is MO's temp recovery. It then boots to this and flashes. (So, perseus is right in that regard. But I personally love Mobile Odin and find it extremely useful and consider it safe unless you are brand new to all of this).
In fact Mobile Odin is another way you can flash 4.1.2. Itll flash the firmware, but only the system, kernel, recovery and modem. (I didnt bring this up previously because I didnt want to confuse, or go too far too fast).
If youre thinking about flashing recovery via MO, though, you can also instead just flash the rom you found. No need to flash the recovery unless you just want to. Put the rom in the update.zip slot and itll flash just fine.
If any of this is confusing, just stick with the original plan for now. The rest will come easy if you dont rush things.
One more thing, while you can usually update stock without wiping, you may find you have to factory reset after downgrading as the old system was not built for using data created on a new version.
Sent from my SGH-T999 using Tapatalk

thanks for all the help.. had to do the wipe since it kept showing the samsung logo but after that it booted just fine.

t999L
I have tried so many times to downgrade to 4.1.2 using odin but I havent be able to. I always get an error message

[Q]********Lots questions on Installing NEW bootloader for 4.2 and 4.3 firmware*****

Hi guys,
I have two T-mobile galaxy s4 M919, one is on MDL firmware and the other is on MK2 firmware.
Here is a few question I really need your wisdom and suggestion.
1. For the MDL firmware, I have simunlocked and rooted it. Also installed TWRP.
Now I am loooking to install the Omega kitkat rom v30. In its installation instruction it requires as following:
Flash the new bootloder and modems with odin
Bootloader -> BL_I9505XXUFNAD_481100_REV06_user_low_ship_MULTI_C ERT.tar.md5
If you already have the new Kit Kat bootloader there is no need to flash it again.
Modems XXUFNC9 -> I9505XXUFNC9_GSM_LTE_Modems.tar
My questions are :
1). Do I need to update my t-mobile bootloader? ( I know should use t-mobile ones). I know if updated could not go back.
2). I thinks I need to install a kitkat modem, which one should I use? Or I should just flash the KT-SGS4 - MJ5 kernel ?
3). If I just want to flash the Insane rom, do I also need to flash bootloader and flash NB4 modem?
Now is questions for the other phone.
2. For the phone with MK2 firnware s4 ( this is another Phone!), I have been following this guide to sim unlock it :
http://forum.xda-developers.com/showthread.php?t=2654058
I am downloding files now. just want to make sure
1) do I need to odin back to 4.3 after my phone is unlocke with old MDL system.
2) if I want to install 4.4 roms, what should I do ?
Thank you for any of your suggestion or ideas.

laofan said:
Hi guys,
I have two T-mobile galaxy s4 M919, one is on MDL firmware and the other is on MK2 firmware.
Here is a few question I really need your wisdom and suggestion.
1. For the MDL firmware, I have simunlocked and rooted it. Also installed TWRP.
Now I am loooking to install the Omega kitkat rom v30. In its installation instruction it requires as following:
Flash the new bootloder and modems with odin
Bootloader -> BL_I9505XXUFNAD_481100_REV06_user_low_ship_MULTI_C ERT.tar.md5
If you already have the new Kit Kat bootloader there is no need to flash it again.
Modems XXUFNC9 -> I9505XXUFNC9_GSM_LTE_Modems.tar
My questions are :
1). Do I need to update my t-mobile bootloader? ( I know should use t-mobile ones). I know if updated could not go back.
2). I thinks I need to install a kitkat modem, which one should I use? Or I should just flash the KT-SGS4 - MJ5 kernel ?
3). If I just want to flash the Insane rom, do I also need to flash bootloader and flash NB4 modem?
Now is questions for the other phone.
2. For the phone with MK2 firnware s4 ( this is another Phone!), I have been following this guide to sim unlock it :
http://forum.xda-developers.com/showthread.php?t=2654058
I am downloding files now. just want to make sure
1) do I need to odin back to 4.3 after my phone is unlocke with old MDL system.
2) if I want to install 4.4 roms, what should I do ?
Thank you for any of your suggestion or ideas.
Click to expand...
Click to collapse
OK. For the MDL phone you should only update your modem unless you want Knox. I see that the files you have chosen are for th I9505. You should never flash international Bootloader or modem or you will brick the phone. So just flash the nb4 modem and flash a KitKat ROM so you can keep your warranty.
Now for the 4.3 phone. All you have to do is root it and flash the nb4 modem or you can flash the full firmware. Either way will work for you since you already have Knox it doesn't really matter.
Sent from my SGH-M919 using XDA Free mobile app

mrzhadow said:
OK. For the MDL phone you should only update your modem unless you want Knox. I see that the files you have chosen are for th I9505. You should never flash international Bootloader or modem or you will brick the phone. So just flash the nb4 modem and flash a KitKat ROM so you can keep your warranty.
Now for the 4.3 phone. All you have to do is root it and flash the nb4 modem or you can flash the full firmware. Either way will work for you since you already have Knox it doesn't really matter.
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
thank you for the timing reply. Now I have more confidence to do next.
just wanted to clarify, For MDL phone, I should flash NB4 modem, kitkat rom and then a T-mobile kernel if going for the Omega i9505 Rom. am I correct?

laofan said:
thank you for the timing reply. Now I have more confidence to do next.
just wanted to clarify, For MDL phone, I should flash NB4 modem, kitkat rom and then a T-mobile kernel if going for the Omega i9505 Rom. am I correct?
Click to expand...
Click to collapse
Correct. You can try the mk2 modem first if you like and then try nb4. You can switch them as you like depending on their performance. Its totally up to you. I would just hate to see you waste your warranty. Not everybody is as lucky as you and I my friend. We both have the stock MDL Bootloader. That's something to brag about now days!!:thumbup:
BTW I am on Insane KitKat and I gotta be honest with you, it is by far the best ROM I have used since MIUI back in my vibrant days! Keep calm, read and flash on my friend!! Wow! From now on that should be my signature jk
Sent from my SGH-M919 using XDA Free mobile app
---------- Post added at 05:04 AM ---------- Previous post was at 04:43 AM ----------
Just so you are aware though. Flashing international ROMs will break some features in your phone like WiFi calling and who knows what else.
Sent from my SGH-M919 using XDA Free mobile app

mrzhadow said:
Correct. You can try the mk2 modem first if you like and then try nb4. You can switch them as you like depending on their performance. Its totally up to you. I would just hate to see you waste your warranty. Not everybody is as lucky as you and I my friend. We both have the stock MDL Bootloader. That's something to brag about now days!!:thumbup:
BTW I am on Insane KitKat and I gotta be honest with you, it is by far the best ROM I have used since MIUI back in my vibrant days! Keep calm, read and flash on my friend!! Wow! From now on that should be my signature jk
Sent from my SGH-M919 using XDA Free mobile app
Click to expand...
Click to collapse
Haha, thanks! I would install insane in one phone and the Omega in the other ( the Omega rom is the hottest rom for i9505).
Cheers.

laofan said:
Haha, thanks! I would install insane in one phone and the Omega in the other ( the Omega rom is the hottest rom for i9505).
Cheers.
Click to expand...
Click to collapse
Salud my friend!
Sent from my SGH-M919 using XDA Free mobile app

[Q] T999v - TWRP (2.7.1.0 or older) “NO OS Found”

Hi All,
I have S3 T999v – Wind variant running on stock 4.4.2 , overall I hate this kitkat experience...
My issue is whenever I try to flash custom recovery TWRP (2.7.1.0 or older), it installs but when I try to take backup it shows nothing to take backup of (no System , no EFS etc....). When I try rebooting it gives error “NO OS Found” I am able to proceed anyways and it starts up phone fine.
Can anyone tell me what could be the issue here??? I wanna downgarde to either stock 4.3 or to install custom liquid smooth 4.4.4. but would prefer to take a back up just in case.
BTW my phone is rooted , rooted it with towel root.
Also can I flash T999 (t-mobile) based recoveries onto my T999v ?
Would appreciate your help :good:.
Thanks

I recommend using d2tmo recoveries over d2can. More roms will be flashable. And you can use any rom here in our forums.
For now, try using either cwm or philz recovery. Youre experiencing a known issue that I believe is related to the hardware revision. I keep hoping to attempt a fix, but just havent had time yet. But for now, one of the other recoveries should work for you.
Sent from my SGH-T999 using Tapatalk

DocHoliday77 said:
I recommend using d2tmo recoveries over d2can. More roms will be flashable. And you can use any rom here in our forums.
For now, try using either cwm or philz recovery. Youre experiencing a known issue that I believe is related to the hardware revision. I keep hoping to attempt a fix, but just havent had time yet. But for now, one of the other recoveries should work for you.
Sent from my SGH-T999 using Tapatalk
Click to expand...
Click to collapse
Thanks Doc,
I will give it a try, but if there is a way to downgardde to 4.3 stock? Tried odin it with sam mobile firmware, its crashing

sam33r said:
but if there is a way to downgardde to 4.3 stock? Tried odin it with sam mobile firmware, its crashing
Click to expand...
Click to collapse
No, you cannot downgrade firmware. Just try what doc said

serio22 said:
No, you cannot downgrade firmware. Just try what doc said
Click to expand...
Click to collapse
Thanks buddy, yup CWM worked :good:
but why cant we downgrade to 4.3, i though it was that one cannot downgrade lower than 4.3 i.e. 4.2. in not possible now!

Knox. They prevent any downgrading to protect against tampering with Knox secure containers. You can't downgrade anymore, period. Anything beyond 4.3 or with Knox will be this way from now on.
Sent from my SAMSUNG-SGH-T999 using Tapatalk

Yeah just like doc said, if you're on 4.3 firmware you can't downgrade firmware to 4.1.2, or if you're on 4.4.2 you can't downgrade to 4.3 or 4.1.2.. Anything lower than your current firmware is a no.. You can only flash equal or newer firmware

[Q] Downgrade stock 4.4.2 to 4.3 with a custom recovery?

I am looking for a way to downgrade from stock 4.4.2 to 4.3. I have read you can't downgrade with odin once your bootloader has been updated....
However, can you on 4.4.2
1) Install a custom recovery
2) Root
3) De-Knox.
4) Nandroid backup rooted deknoxed 4.4.2 (just to be safe).
Then,
Install a rooted stock 4.3 rom such as the one found in this page:
http://www.droidviews.com/install-android-4-3-leaked-firmware-on-att-galaxy-s3-note-2-galaxy-s4-s4-active/
Starting at the text "For AT&T S3 Users with Root and Custom Recovery" which links to a rooted 4.3 zip file?
http://www.androidfilehost.com/?fid=23196940996968760
Seems like this might work?

You can flash older roms. Just not older firmware and modems.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

DocHoliday77 said:
You can flash older roms. Just not older firmware and modems.
Sent from my SAMSUNG-SGH-I747 using Tapatalk
Click to expand...
Click to collapse
Thanks for the response.
Just to be clear.
Refurbished i747 shipped with 4.4.2 installed
ne4 bootloader
ne4 modem
Can I still flash a touchwiz 4.3 stock rom provided I don't overwrite the modem or bootloader? If so, will the touchwiz 4.3 rom work with the ne4 modem? Seems like the old rom may not play well with a new modem.
Again, my main goal is to use Drivelink app to use mirrorlink with my car radio head. Drivelink only works on 4.3.
Thanks for your help and patience.

I was thinking of trying this rom with ne4 modem and bootloader....
[ROM][JB 4.3] i747z UCUEMJ2 (Modified) Stock TouchWiz No-Knox ROM(Odexed)NEW 11/23/13
http://forum.xda-developers.com/showthread.php?t=2075639
Is this a bad idea?

Should be perfectly fine. As for how well the modem works with it, it's never been much of an issue. People have been running mixed builds since the first update. It's possible it might not work quite as well, but I doubt any differences would be great enough to notice.
As for your Drive link, is it limited to 4.3 on the app side, or is it more of a rom issue? If the app simply isn't compatible, not much can be done there. But someone (I think in the S3Rx thread just found out how to get Chromecast to work. Maybe that would help your app on a 4.4.2 rom?
Sent from my SAMSUNG-SGH-I747 using Tapatalk