Stock G900a downgrade from Marshmallow to Lollipop - AT&T Samsung Galaxy S 5

Searching via cell isn't great for me at the moment. I've found a few threads with lollipop files to use in Odin. But I haven't read anything that says it's simple to flash them and downgrade properly from Marshmallow to Lollipop. Is there a tutorial/file thread already on here that I am missing via search? Is this something I can do without rooting?

Da hell is that chipmunk woman

Sammobile doesn't have the stock 5.1 firmware.. is that an omen against downgrading?

Most of the posts ive read are indicating Marshmallow is not able to be downgraded, bootloader locked.. looks like a dead end

It's a different boot loader, will not be able to downgrade. There is no root option at this time as well.

johnkirchner said:
It's a different boot loader, will not be able to downgrade. There is no root option at this time as well.
Click to expand...
Click to collapse
sorry, but i disagree. i just flashed from 6.0.1 to 5.1.1 using odin and firmware found here on XDA. I have no problems with phone so far.

At the time of my post months ago, this was not possible. It is very possible now, I have also done it.

gooch1006 said:
sorry, but i disagree. i just flashed from 6.0.1 to 5.1.1 using odin and firmware found here on XDA. I have no problems with phone so far.
Click to expand...
Click to collapse
This is for the AT&T model, I haven't been able to crack into mine. I have battery issues since marshmallow and want to go back to 5.1.1 as well... where did you get the files, and what process did you use?

Downgrade instructions can be found here:
http://forum.xda-developers.com/showthread.php?p=67323522

johnkirchner said:
Downgrade instructions can be found here:
http://forum.xda-developers.com/showthread.php?p=67323522
Click to expand...
Click to collapse
Thanks for the link, i had searched without luck on my own.

https://forum.xda-developers.com/att-galaxy-s5/general/guide-merry-christmas-heres-t3516196
following this guide for rolling back to LP, work for me downgrade from MM and getting root on LP.

Mine didn't... version DPH4, october 1, 2016 security patch, odin gave me an error something like level 4 > 3 and didn't start the reflash process. I was able to reflash the same 6.0.1 and its not the same as what was on there, so maybe the ota updates had a problem? I'm still locked out of downgrading.

Mine also from DPH4 oct 1, 2016. Having issue with lte, i cant receive call but i can make call. So im rollback to COI5 and follow the instruction from page 2. Get odin 3.11.1 to flash BL,AP,etc. Have you try with other usb cable?

kecel said:
Mine also from DPH4 oct 1, 2016. Having issue with lte, i cant receive call but i can make call. So im rollback to COI5 and follow the instruction from page 2. Get odin 3.11.1 to flash BL,AP,etc. Have you try with other usb cable?
Click to expand...
Click to collapse
i had that issue at one point, i just flashed the CSC and CP again and it worked.. Idk if it's that simple for you guys tho..

g900a downgrade from 6.0.1 to 5.1.1
djs2571 said:
This is for the AT&T model, I haven't been able to crack into mine. I have battery issues since marshmallow and want to go back to 5.1.1 as well... where did you get the files, and what process did you use?
Click to expand...
Click to collapse
i also have the at&t model, but used some info in this post: https://forum.xda-developers.com/att-galaxy-s5/general/guide-merry-christmas-heres-t3516196
i used odin to flash full OI5 firmware, minus the bootloader file. Only use the AP, CP, and CSC files. the bootloader is the same. and really, i had already flashed the PA2 build earlier that day i remember now. would probably do that first. flashing the PA2, i used all four files, BL, AP, CP, and CSC . they both flashed the first time, if they dont then try a different cable first. usually that is my issue.
so , i flashed from 6.0.1 down to 5.1.1 pa2, then down to oi5. still have no problems other than getting root..... im focusing on bootloader now, i have unlocked them on htc's before, but havent tried any other phone yet. the work continues tonight.

Related

Kitkat wifi issue

Haven't seen a thread for this, so here it goes. I followed one of the guides to get me to kk. I was having trouble doing ota so I flashed the 2400258.zip file, and rooted with tr. Not sure if the problem was there before root, but after every restart, I have to re enter wifi password. I have tried udroid, and firekat ,and still same issue. Any help is greatly appreciated, thank you. Would also like to add my wife is on 100% official kk, rooted with tr, and she has no issues.
You must be on nc2 rom with old bootloader.
i have the same wifi issue.
1. Flash the nc2 bootloader
or flash a older rom that is not nc2.
netnerd said:
You must be on nc2 rom with old bootloader.
i have the same wifi issue.
1. Flash the nc2 bootloader
or flash a older rom that is not nc2.
Click to expand...
Click to collapse
What thread is the bootloader, and if it's Odin, what option do I flash it? ap?
Everybody say do not flash new bootloader cus you can't downgrade back to jellybean. But why would you want to go back?
Check the general thread titled nc2 bootloader/download fix.
Thanks bud. I'll give it a go.

Can't find I537UCUCNH3 (4.4.2)

So i get an i537 locked on AT&T ion ebay by almost 100 bucks so i decided to buy it instead an S3 because for the price was a better choice , thinking that i could unlock "free" but then i realized that i could do it but i had to have the zx3 box.... thing that i did'nt have and i am not going to buy it . So i had to buy the unlock code almost for 15 bucks on ebay with a link from a store of Spain, took me around 4 days to have it. The first thing that i wanted to do was root it, i hate bloatware, so i rooted it and leave the stock rom, yesterday i saw in gsmarena.com that it was getting Lollipop via OTA, so i had to restore it back in order to get it. Mine was running I537UCUCNH3 but i couldn't get the full firmware that is almost 1 gb or something like that so by mistake i get the I537UCUCNE3 to flash on odin.
It flash with no problems but then i get the problem that i didn't have the radio service, so i flashed the modem bin from here http://forum.xda-developers.com/showthread.php?t=2689218, after that i get signal and check for the update and it begins to download, almost an hour and a half then it begins to install the update and reboot and when it was on 28% it turned off and reboot. Then it says firmware was not installed and checked for the update and it says that is up to date check in XX hours again. I checked the band version and was on UCUAMF1 but with the I537UCUCNE3 version so i think that i flash it wrong and may be in the process of the update as is does not match it failed the update.
Now i can't restore again the modem.bin because it fails so i need urgent help to restore it and the lollipop update
tonochito said:
So i get an i537 locked on AT&T ion ebay by almost 100 bucks so i decided to buy it instead an S3 because for the price was a better choice , thinking that i could unlock "free" but then i realized that i could do it but i had to have the zx3 box.... thing that i did'nt have and i am not going to buy it . So i had to buy the unlock code almost for 15 bucks on ebay with a link from a store of Spain, took me around 4 days to have it. The first thing that i wanted to do was root it, i hate bloatware, so i rooted it and leave the stock rom, yesterday i saw in gsmarena.com that it was getting Lollipop via OTA, so i had to restore it back in order to get it. Mine was running I537UCUCNH3 but i couldn't get the full firmware that is almost 1 gb or something like that so by mistake i get the I537UCUCNE3 to flash on odin.
It flash with no problems but then i get the problem that i didn't have the radio service, so i flashed the modem bin from here http://forum.xda-developers.com/showthread.php?t=2689218, after that i get signal and check for the update and it begins to download, almost an hour and a half then it begins to install the update and reboot and when it was on 28% it turned off and reboot. Then it says firmware was not installed and checked for the update and it says that is up to date check in XX hours again. I checked the band version and was on UCUAMF1 but with the I537UCUCNE3 version so i think that i flash it wrong and may be in the process of the update as is does not match it failed the update.
Now i can't restore again the modem.bin because it fails so i need urgent help to restore it and the lollipop update
Click to expand...
Click to collapse
Flash the NE3 Odin package again and then flash the NH3 OTA update. Assuming that your radios are working you should get the OC6 update right away. Just be aware that currently there is no way to root OC6 and may never be, plus there is no way to downgrade back to a firmware that is rootable.
The issue you're running in to is that the updater checks all the files on the phone before installing the update. If all the files match what it thinks should be there then it will update just fine. If anything is changed, any system files, modems, or even if you've just rooted the update will fail to install as you've seen.
Devo7v said:
Flash the NE3 Odin package again and then flash the NH3 OTA update. Assuming that your radios are working you should get the OC6 update right away. Just be aware that currently there is no way to root OC6 and may never be, plus there is no way to downgrade back to a firmware that is rootable.
The issue you're running in to is that the updater checks all the files on the phone before installing the update. If all the files match what it thinks should be there then it will update just fine. If anything is changed, any system files, modems, or even if you've just rooted the update will fail to install as you've seen.
Click to expand...
Click to collapse
No i don't have the NH3 OTA i have the previous one and the post is very annoying and confusing for me, i have this one SGH-I537UCUCNE3_v4.4.2_ATT_ALL but now i can't get service as i mentioned now if i flash the modem.bin it fails i think that i bricked it.
And yes i kow that if something does not match on a system update it will fail, had the same sittuation on the HTC One m7 when it was going to lollipop update but i just flashed the correct firmware and it worked but with this one i am havig a hardtime, because has the baseband version unknown but i can't flash the modem.bin
tonochito said:
No i don't have the NH3 OTA i have the previous one and the post is very annoying and confusing for me, i have this one SGH-I537UCUCNE3_v4.4.2_ATT_ALL but now i can't get service as i mentioned now if i flash the modem.bin it fails i think that i bricked it.
And yes i kow that if something does not match on a system update it will fail, had the same sittuation on the HTC One m7 when it was going to lollipop update but i just flashed the correct firmware and it worked but with this one i am havig a hardtime, because has the baseband version unknown but i can't flash the modem.bin
Click to expand...
Click to collapse
Open the i537 Firmware Thread for links to all firmware
Reflash the NE3 Odin package
Flash the NH3 OTA file
Flash the OC6 OTA file
Devo7v said:
Open the i537 Firmware Thread for links to all firmware
Reflash the NE3 Odin package
Flash the NH3 OTA file
Flash the OC6 OTA file
Click to expand...
Click to collapse
Yes i have flahed that one and i have no signal but none of the firmware updates works both fails. One says footer is wrong the oficial one may i have to downgrade all the way till 4.3?
tonochito said:
Yes i have flahed that one and i have no signal but none of the firmware updates works both fails. One says footer is wrong the oficial one may i have to downgrade all the way till 4.3?
Click to expand...
Click to collapse
Did you read through the [HOW-TO][GUIDE] Install Any i537 Firmware? It explains exactly how to install any firmware you want. I know why you're having problems flashing the OTA's, but it seems like you haven't read how to flash them.
Devo7v said:
Did you read through the [HOW-TO][GUIDE] Install Any i537 Firmware? It explains exactly how to install any firmware you want. I know why you're having problems flashing the OTA's, but it seems like you haven't read how to flash them.
Click to expand...
Click to collapse
yes i have read it, it flash with no problems but weird part is that yesterday it worked fine but when i got the signal fix it shows on system version I537UCUCNE3 but band version was on MF1 an not on NE3. I can't remember what exactly i did after lollipop update fail but now i can't get the modem.bin working. So i guess that something went wrong during flash yesterday that now i can't fix the signal
tonochito said:
yes i have read it, it flash with no problems but weird part is that yesterday it worked fine but when i got the signal fix it shows on system version I537UCUCNE3 but band version was on MF1 an not on NE3. I can't remember what exactly i did after lollipop update fail but now i can't get the modem.bin working. So i guess that something went wrong during flash yesterday that now i can't fix the signal
Click to expand...
Click to collapse
The signal fix flashes the MF1 modems, that is why your band version says MF1; you're actually using modems from a older firmware.
These are exactly the steps you need to follow:
Start over and flash the NE3 Odin package. It doesn't matter if you have a signal or not because you should have already downloaded the OTA files with your computer ahead of time.
Once you're on stock NE3 (without modifying the modem), flash the NH3 OTA. Instructions on how to do that are described in detail in the i537 Firmware Guide.
Once you're on stock NH3, flash the OC6 OTA file. Instructions are described in detail in the i537 Firmware Guide.
If you still don't have a signal after you're on OC6, then try the Modem fix, but it may not work.
Basically what you need to do is follow the instructions step by step in the section titled "NE3 to OC6".
Devo7v said:
The signal fix flashes the MF1 modems, that is why your band version says MF1; you're actually using modems from a older firmware.
These are exactly the steps you need to follow:
Start over and flash the NE3 Odin package. It doesn't matter if you have a signal or not because you should have already downloaded the OTA files with your computer ahead of time.
Once you're on stock NE3 (without modifying the modem), flash the NH3 OTA. Instructions on how to do that are described in detail in the i537 Firmware Guide.
Once you're on stock NH3, flash the OC6 OTA file. Instructions are described in detail in the i537 Firmware Guide.
If you still don't have a signal after you're on OC6, then try the Modem fix, but it may not work.
Basically what you need to do is follow the instructions step by step in the section titled "NE3 to OC6".
Click to expand...
Click to collapse
well yes i did but weird part is that now i had to flash the second one the ml2 but still shows mf1,when i got the active it was on nh3 and i remember that i flashed the mf1.
But i am trying to do as says the post, no changing anything but i get that footer wrong and signature failed and the baseband unknow or may be something in that file is corrpupted i am using Odin 3.07 and the firmware after using winrar is 2.33 gb
tonochito said:
well yes i did but weird part is that now i had to flash the second one the ml2 but still shows mf1,when i got the active it was on nh3 and i remember that i flashed the mf1.
But i am trying to do as says the post, no changing anything but i get that footer wrong and signature failed and the baseband unknow or may be something in that file is corrpupted i am using Odin 3.07 and the firmware after using winrar is 2.33 gb
Click to expand...
Click to collapse
Are you saying that you can no longer flash the NE3 Odin package?
Devo7v said:
Are you saying that you can no longer flash the NE3 Odin package?
Click to expand...
Click to collapse
yes i can but i can't flash any of the nh3 firmware and remais with the unknown base band, perphaps the kernel was bricked? now i remember that i tried to do the steps of z3x box and happens the same situation unknown baseband
tonochito said:
yes i can but i can't flash any of the nh3 firmware and remais with the unknown base band, perphaps the kernel was bricked? now i remember that i tried to do the steps of z3x box and happens the same situation unknown baseband
Click to expand...
Click to collapse
So you can reflash the NE3 Odin package, that's good. I understand you don't have a baseband, but we need to make sure you can update your phone to NH3 and OC6 before we try to fix that. What exactly does your phone say when you try to flash the NH3 update? Maybe posting a photo would be easier.
Also check that the MD5 of the files you downloaded matches the MD5 posted in the i537 Firmware Thread. If the MD5's match then you have a good download, if they don't match then you have a corrupted download and need to redownload the files.
Devo7v said:
So you can reflash the NE3 Odin package, that's good. I understand you don't have a baseband, but we need to make sure you can update your phone to NH3 and OC6 before we try to fix that. What exactly does your phone say when you try to flash the NH3 update? Maybe posting a photo would be easier.
Also check that the MD5 of the files you downloaded matches the MD5 posted in the i537 Firmware Thread. If the MD5's match then you have a good download, if they don't match then you have a corrupted download and need to redownload the files.
Click to expand...
Click to collapse
it's very weird why i can't flash the NH3, trust me i have since yesterday i have tried but no luck, i have followed all steps and fails
tonochito said:
it's very weird why i can't flash the NH3, trust me i have since yesterday i have tried but no luck, i have followed all steps and fails
Click to expand...
Click to collapse
What file is inside the update.zip file you created? Can I see a screenshot from your computer?
Devo7v said:
What file is inside the update.zip file you created? Can I see a screenshot from your computer?
Click to expand...
Click to collapse
the cfg
tonochito said:
the cfg
Click to expand...
Click to collapse
Honestly, I have no idea why it isn't working. I would suggest downloading the file again (make sure the MD5's match), I'm going to upload another copy I have and send you a link to it to try.
tonochito said:
the cfg
Click to expand...
Click to collapse
Wait did you put the cfg inside a zip?! You have to rename 240058.cfg to update.zip, not compress it to a zip archive. Or did I misunderstand your post?
Devo7v said:
Honestly, I have no idea why it isn't working. I would suggest downloading the file again (make sure the MD5's match), I'm going to upload another copy I have and send you a link to it to try.
Click to expand...
Click to collapse
i did it twice from the post and from another guy who upload the same file, that's the reason that i was thinking to downgrade to 4.3 but may be i won't be able to do it
Give this file a shot. I know for a fact people have downloaded it and updated to NH3 successfully.
thisisapoorusernamechoice said:
Wait did you put the cfg inside a zip?! You have to rename 240058.cfg to update.zip, not compress it to a zip archive. Or did I misunderstand your post?
Click to expand...
Click to collapse
i have done both things the problem is that i don't have baseband flashing the stock file of NC3 after i try to update to NH3 it fails no matter i do so i can't install lollipop, i have baseband flashing the old modem.bin but can't install the updates

[Q] How many times can I OTA before its too late?

Hey ho guys. I have a 5S with the Downgrade to NCE flash found on this board. I would like to have the latest Kitkat without updating to Lollipop and getting the locked bootloader. I just downgraded today to NCE and bravely did one OTA. It got me to NG3. Can I OTA again to get OA1 or will it jump me to OC4? Or should I use one of the methods here on the board to upgrade and totally avoid OTA? Thanks, later.
Sowden said:
Hey ho guys. I have a 5S with the Downgrade to NCE flash found on this board. I would like to have the latest Kitkat without updating to Lollipop and getting the locked bootloader. I just downgraded today to NCE and bravely did one OTA. It got me to NG3. Can I OTA again to get OA1 or will it jump me to OC4? Or should I use one of the methods here on the board to upgrade and totally avoid OTA? Thanks, later.
Click to expand...
Click to collapse
If you want root capabilities i wouldn't take any OTA. You'll still have to go back to NCE to root anyhow i believe. As far as the boot loader it is and always has been locked on the AT&T S5. The only method for root is towel root and I'm not sure if it'll work on NG3. If not you'll have to go down to NCE
dirtydodge said:
The only method for root is towel root and I'm not sure if it'll work on NG3. If not you'll have to go down to NCE
Click to expand...
Click to collapse
Yeah, I should have preference that I am after root. But towelroot works on NG3, you can read about that here.
http://forum.xda-developers.com/att-galaxy-s5/general/g900and3tong3keeprootota-zip-t2862299
After I took the brave OTA I followed the threads instructions and it worked. There is a thread here that talks about root for OA1.
http://forum.xda-developers.com/att...to-root-g900aucu2aoa1-4-4-4-2-3-2015-t3021120
It says just to take the OTA. I guess its still safe to take the OTA then after NG3? And I can't seem to find any rom on here thats stock OA1. Anyone know if I aren't seeing it? Thanks.
Sowden said:
Yeah, I should have preference that I am after root. But towelroot works on NG3, you can read about that here.
http://forum.xda-developers.com/att-galaxy-s5/general/g900and3tong3keeprootota-zip-t2862299
After I took the brave OTA I followed the threads instructions and it worked. There is a thread here that talks about root for OA1.
http://forum.xda-developers.com/att...to-root-g900aucu2aoa1-4-4-4-2-3-2015-t3021120
It says just to take the OTA. I guess its still safe to take the OTA then after NG3? And I can't seem to find any rom on here thats stock OA1. Anyone know if I aren't seeing it? Thanks.
Click to expand...
Click to collapse
Most of the roms are based on nce or ng3. If you go to oa1 and flash a nce or ng3 rom your phone will be slow because of the different bootloader, and the camera is screwed up. I'd stay on ng3 and not worry about oa1. That's my opinion. I'm on 5.0 running the Twi5ted rom and having no problems with it. Most devs have moved to 5.0 lollipop and the 4.4.2 - 4.4.4 roms will be more and more abandond in my opinion.
dirtydodge said:
Most of the roms are based on nce or ng3. If you go to oa1 and flash a nce or ng3 rom your phone will be slow because of the different bootloader, and the camera is screwed up. I'd stay on ng3 and not worry about oa1. That's my opinion. I'm on 5.0 running the Twi5ted rom and having no problems with it. Most devs have moved to 5.0 lollipop and the 4.4.2 - 4.4.4 roms will be more and more abandond in my opinion.
Click to expand...
Click to collapse
Ah see I haven't tried any of the custom roms posted on here yet. But can I have NC3 as stock and on another ROM Slot (using Safestrap) have a Lollipop rom? Having one slot be 4.2.2 and the other be 5, basically. So the bootloader is different from NC3 to OA1, good to know. I'm glad I stopped at NC3 then. Thanks for your help.
Sowden said:
Ah see I haven't tried any of the custom roms posted on here yet. But can I have NC3 as stock and on another ROM Slot (using Safestrap) have a Lollipop rom? Having one slot be 4.2.2 and the other be 5, basically. So the bootloader is different from NC3 to OA1, good to know. I'm glad I stopped at NC3 then. Thanks for your help.
Click to expand...
Click to collapse
I'm not sure on the different slots and bootloader mainly because when i used different slots the battery drain was unbearable. I don't know if they every fixed the battery drain issue when using different slots. It was bad enough that i just stuck to the stock slot and flashed only in that slot.

Has anyone confirmed downgrade from MM?

As the thread states....has anyone tried to flash stock DOK2 firmware from the new MM update? I have searched and asked many questions but have not gotten a solid answer. And if no one knows or no one has tried yet, would someone who had already taken the update be willing to try flashing stock DOK2 firmware? For developmental purposes. Thanks in advance. ?
Anyone got root for Marshmallow?
viewsfromthepi said:
Anyone got root for Marshmallow?
Click to expand...
Click to collapse
Root works perfectly fine. Use SuperSu Systemless root. I believe the version number is 2.74-2. It's the latest beta if I'm not mistaken.
First use ODIN to get TWRP onto the device and then flash the supersu zip like usual.
I was thinking of just using flashfire to flash BL and modem only then install the rom..that way it doesnt overwrite recovery... bad idea ?
noob4598 said:
I was thinking of just using flashfire to flash BL and modem only then install the rom..that way it doesnt overwrite recovery... bad idea ?
Click to expand...
Click to collapse
Yes, bad idea. No shortcuts on base updates.
Sent from my SM-N910T using XDA-Developers mobile app
noob4598 said:
As the thread states....has anyone tried to flash stock DOK2 firmware from the new MM update? I have searched and asked many questions but have not gotten a solid answer. And if no one knows or no one has tried yet, would someone who had already taken the update be willing to try flashing stock DOK2 firmware? For developmental purposes. Thanks in advance. ?
Click to expand...
Click to collapse
I was able to downgrade to DOK2 but I only flashed the bootloader & modem file not the entire firmware
If you flashed BL then we are good. I wonder if the MM bootloader is like n910G.....they couldn't go from 5.1.1 to 4.4.4 but when they got 6.0.1 they were able to got back 2 steps to 4.4.4.like a magical BL unlock ha
xoxo_xdagirl91 said:
I was able to downgrade to DOK2 but I only flashed the bootloader & modem file not the entire firmware
Click to expand...
Click to collapse
What files did you use? I tried flashing the entire dok2 firmware through Odin and kept getting stuck in a bootloop. If I could just flash those 2 files that would be great.
Sent from my SM-N910T using XDA-Developers mobile app
nymikey said:
What files did you use? I tried flashing the entire dok2 firmware through Odin and kept getting stuck in a bootloop. If I could just flash those 2 files that would be great.
Sent from my SM-N910T using XDA-Developers mobile app
Click to expand...
Click to collapse
DOK2 Bootloader: https://www.androidfilehost.com/?fid=24269982087008410
DOK2 Modem: https://www.androidfilehost.com/?fid=24269982087008409
I used odin 3.11.1: http://dl.sammobile.com/Odin3-v3.11.1.zip
put the bootloader in the BL section & the modem in the CP section of odin
xoxo_xdagirl91 said:
DOK2 Bootloader: https://www.androidfilehost.com/?fid=24269982087008410
DOK2 Modem: https://www.androidfilehost.com/?fid=24269982087008409
I used odin 3.11.1: http://dl.sammobile.com/Odin3-v3.11.1.zip
put the bootloader in the BL section & the modem in the CP section of odin
Click to expand...
Click to collapse
Thanks, I'm gonna give this a try.
Sent from my SM-N910T using XDA-Developers mobile app
I have downgraded from a full PE3 to OK2. Worked fine.
Awesome...that makes me feel safer...I might try to odin nk4 later just for ships and giggles haha
does anyone know if you can downgrade from MM PE3 to KK ANK4? I know that you can't go from DOK2 to ANK4. Love firekat too much
noob4598 said:
If you flashed BL then we are good. I wonder if the MM bootloader is like n910G.....they couldn't go from 5.1.1 to 4.4.4 but when they got 6.0.1 they were able to got back 2 steps to 4.4.4.like a magical BL unlock ha
Click to expand...
Click to collapse
Someone needs to try this ASAP.
Karina Kapri said:
Someone needs to try this ASAP.
Click to expand...
Click to collapse
I had a T-mobile Note 4 (N910T) on 5.0.1 , downgraded to KitKat 4.4.4, when Lolipop 5.1.1 came out I upgraded. rooted, and then flashed custom rom Tekxodus .. phone used to restart randomly .. later discovered that once you upgrade OK2 you get locked and no longer can downgrade to KK.
later on, the phone started to give mmc error and then just died.
Lesson Learned, stay on 5.0.1 or downgrade to 4.4.4 and stay there.
I still wonder if Android 6.0.1 Locks down the downgrade process to 4.4.4. I doubt it will allow it.
DeeXii said:
I have downgraded from a full PE3 to OK2. Worked fine.
Click to expand...
Click to collapse
Ok. You just downgrade, but I have a question.
After you flashed BL and CS, you still have to flash the firmware, right? So, I have to have the firmware OK2 too, right?
Chrisayami said:
Ok. You just downgrade, but I have a question.
After you flashed BL and CS, you still have to flash the firmware, right? So, I have to have the firmware OK2 too, right?
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im also waiting for this reply hehehe...
SeerePetrova said:
im also waiting for this reply hehehe...
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Yea if you want everything to be OK2 but its not necessary....if you are gonna use twrp, u dont need to odin recovery....and if you are gonna use a custom rom instead of stock then you dont need to odin system...so basically anyone with twrp and a custom OS is only using BL and Modem
But i always just flash it all just to be thorough....
xoxo_xdagirl91 said:
DOK2 Bootloader: https://www.androidfilehost.com/?fid=24269982087008410
DOK2 Modem: https://www.androidfilehost.com/?fid=24269982087008409
I used odin 3.11.1: http://dl.sammobile.com/Odin3-v3.11.1.zip
put the bootloader in the BL section & the modem in the CP section of odin
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Can i flash that with flashhire app? (Without odin) And without loose my twrp?
Thanks!

I need some help with getting back to unlocked firmware.

I recently made an insurance claim for my phone and had to send my unlocked firmware note 8 back. Problem I'm having now is, I cant get the new one on an unlocked firmware. I keep getting errors in all the Odins I have. I dont know much about the v4 bootloader or when it was locked. I was able to gi back to Nougat on my old phone and then upgrade back oreo. That was in August though. Any help would be appreciated. I cant stand this ATT ****!
cameronw2023 said:
I recently made an insurance claim for my phone and had to send my unlocked firmware note 8 back. Problem I'm having now is, I cant get the new one on an unlocked firmware. I keep getting errors in all the Odins I have. I dont know much about the v4 bootloader or when it was locked. I was able to gi back to Nougat on my old phone and then upgrade back oreo. That was in August though. Any help would be appreciated. I cant stand this ATT ****!
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You can only flash the same bootloader v4 firmwares or higher from now on. No downgrading possible to bootloader v3 or below!
Can't even go back to Nougat (that was on bootloader v3 and below)!
If you are just need the unbranded firmwares look for the ones with the bootloader v4.
Eg N950U(U1)SQS"4"CRH1. The 4 in "" is your bootloader version.
If you want to root or go back to nougat then you'll need to talk to ATT for another phone that's on bootloader v3 or below.
BluePhnx said:
You can only flash the same bootloader v4 firmwares or higher from now on. No downgrading possible to bootloader v3 or below!
Can't even go back to Nougat (that was on bootloader v3 and below)!
If you are just need the unbranded firmwares look for the ones with the bootloader v4.
Eg N950U(U1)SQS"4"CRH1. The 4 in "" is your bootloader version.
If you want to root or go back to nougat then you'll need to talk to ATT for another phone that's on bootloader v3 or below.
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Could you possibly link me the the firmware I do need? I would really appreciate as I'm stuck on this current firmware. I've looked and looked. I'm just unable to find the right firmware. I suppose it's possible I'm not getting the right one. Idk.
cameronw2023 said:
Could you possibly link me the the firmware I do need? I would really appreciate as I'm stuck on this current firmware. I've looked and looked. I'm just unable to find the right firmware. I suppose it's possible I'm not getting the right one. Idk.
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The easiest is to use SamFirm to download the firmware. Then use modified ODIN 3.13.1 to flash it.
Mr. Orange 645 said:
The easiest is to use SamFirm to download the firmware. Then use modified ODIN 3.13.1 to flash it.
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I figured all out! I managed fo flash the latest unlocked without any issues.

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