yashsingh1/xdaforums huggingface dataset:
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
I had problems of phone rebooting automatically and showing emc-read error and cannot boot normally and had to remove battery to start my canadian note 4 W8

the way i fixed this **** is by reverting back to 5.0.1 bootloader

the newest bootloader is the cause of all problems for us

you cannot roll back to the old bootloader just by flashing an old bootloader

but luckily i have found a trick to revert back to a older bootloader to replace **** COK3 (Newest for canadian ) bootloader

So to actually roll back to old boot loader you need a full firmware which has capability to format internal storage when it is flashed

i had a 5.1.1 firmware tar but it did not have the capability of formatting internal storage when it is flashed

But i lucky found a older 5.0.1 tar in my harddisk that has the capability which enabled me to go back to old baseband and bootloader and formatted internal storage and now everything fine

Phone flying as before without any reboots emc read error or lags (i think the reason why this tar worked and back flashed the boot loader is because it formatted the internal storage while the tar was being executed)

just to be extra cautious,once you have old boot loader flash recovery and wipe system,cache,dalvik and internal storage

*IMP GO TO WIPE>FORMAT DATA AND TYPE YES

*MAKE SURE TO RE-FLASH JUST 5.1.1 BASEBAND FOR NOTE 5 PORTS AND CM12.1/13 TO HAVE NETWORK

Attaching the error i had and pic of my current setup

FOR PEOPLE WHO STILL CANNOT DOWNGRADE BOOT LOADER YOU CAN TRY PARTITIONING YOU INTERNAL MEMORY TO FIX READ WRITE ERRORS

LINK OF THE FIRMWARE I USED

http://xdaforums.com/note-4/general/ref-stock-firmware-kernel-modem-recovery-t2920452

LINK TO PIT FILES FOR REPARTITIONING

http://xdaforums.com/note-4/orig-development/note-4-pit-files-repartiton-f-g-c-t-w8-t3282641/post64569392#post64569392

Canadians having same issue can now flash this firmware to go back to 5.0.1 bootloader

*i think this would work for Tmobile users too but i am not sure about the risks of cross flashing
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
i checked my 5.0.1 and 5.1.1 tars and they both have same files so i cant tel which tar you should download for internal storage to be formatted

my most educated guess would be try and download early 5.0.1 builds as samsung must have implemented formatting internal storage when from kitkat to lollipop uograde

And odin 3.10.7
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] rajatkuthiala:
Help Me

Hi,

Can you please help me lookup stock firmware for SM-N910T(T Mobile Note 4) which I can use to rollback my bootloader.

Thank You
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] thiennvbk:
Please help me...

I'm using note 4 n910t and have the same problem of your phone before...very lag and auto turn off the phone,can't boot up or error "mmc read fail".

Can't use your firwame for n910t?!. I know that n910t and n910w8 can using same firwame

---------- Post added at 03:53 PM ---------- Previous post was at 03:47 PM ----------

Can you upload you 5.0.1 bootloader and the manual to fix this error?!

I think a lot of people have this issue when update to newest firwame from samsung, and they are watting for a way to fix their phone

Thanks a lots! ^^
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] McMichael96:
I keep getting "auth" fails. I can only flash the 5.1.1 software

Please get back to us asap, it's driving me crazy with my phone consistently rebooting and freezing
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
Flash custom rom first

Maybe a cm 12 build and try again
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
As i said before

just flashing the bootloader doesnt work

U need the full firmware with internal storage wiping capability to return to older bootloader

I will do one thing to help everyone out

Either i will track down the link to download the 5.0.1 firmware i used

Or

I will upload the full 1.7 gb tar firmware

Till then find a older 5.0.1 firmware for your model and try it
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] McMichael96:
I tried that. Still didn't work. And I have a pretty old copy of 5.0.1. I think it has to do with how T-Mobile/Samsung pushed security policy's to this device. I read up where the last ones actually prevent downgrades.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
I checked on samfirmware

And the BOE2 firmware 5.0.1 i have is the last version of 5.0.1 just before 5.1.1 started rolling out

So download the last version of 5.0.1 just before 5.1.1 released
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] McMichael96:
Will the Canadian firmware even work in odin for the t-mobile variant?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
Tmobile roms work out of the box for canadian note 4

But bootloader is on a whole another level

U can easily flash another baseband if phones gets busted but i dont know about bootloader

If you are in warrenty you should give it a try
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
It might but u shld download the BEO2 equivalent for tmobile
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] timg11:
I don't know if I have this problem or not. A few days ago I installed "[N910TUVU2DOK2] Debloated-Deodexed Stock ROM[Dec-18-2015]" along with TWRP recovery. It has seemed to be OK, but I did have a couple of unexpected random reboots. Today while using the phone, it just froze. It did not reboot. After battery pull, I tried to get into recovery, but nothing but short vibrations every 10 seconds or so.

I have not seen any messages about emmc_. The screen remained black entirely. I was unable to get into download mode or recovery mode. When I plugged in with USB, I was able to get it to recognized on USB and in Odin, but had not idea what mode it was in since the screen was black.

After letting it sit a while, I tried again, and was able to boot into recovery. From there, I was able to reboot into Andriod, and everything seems to be normal again.

Is this the same issue? Should I revert the bootloader? If so, what is the correct bootloader for the TMO Note4 N910TUVU2DOK2 ? I have stock ROM for 5.0.1 (N910TUVU1COD6_N910TTMB1COD6_N910TUVU1COD6_HOME.tar.md5) which contains the file boot.img. But in the first post it says it is not possible to simply flash boot.img with Odin?

The required procedure is this?

1) Flash the 5.01 stock firmware N910TUVU1COD6_N910TTMB1COD6_N910TUVU1COD6_HOME.tar.md5 (including the desired bootloader)

2) Boot into stock firmware

3) Select Factory Reset (to execute the data wipe capability in 5.0.1)

4) Shut down and boot into download mode.

5) Flash TWRP

6) Flash 5.1.1 N910TUVU2DOK2 (previously modified to remove boot.img from the tar.md5 file?)

( would this step 6 cause the full functionality of 5.1.1 to be available, but with the non-broken bootloader?)
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] thiennvbk:
That mean I can download last 5.0.1 firwame and use odin to flash??.

I have try one and odin fail because binary. It isn't allow to come back 5.0.1 firwame.

Can you share the link of 5.0.1 firwame that you had been flash over odin?!

Thanks
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] timg11:
Hmm, it's not quite that simple. Just installing 5.0.1 would leave you downgraded to 5.0.1.

There are reasons to move to 5.1.1 (if it works right), so we're trying to determine how to get the BL from 5.0.1 and everything else from 5.1.1.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
you can flash the 5.0.1 firmware now and then flash a 5.1.1 custom rom

so the bootloader version doesnt matter as long as its lollipop

but for baseband you need 5.1.1 baseband for 5.1.1 roms to have network
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
i have a canadian W8 variaant and i am not sure about the risks of cross flashing

Luckly i found the link of the firmware i used

here it is

http://xdaforums.com/note-4/general/ref-stock-firmware-kernel-modem-recovery-t2920452

Download the link in first post
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] timg11:
OK, when I flash the 5.1.1 custom ROM, wouldn't that put the bad boodloader back int?

If I want to end up on 5.1.1 N910TUVU2DOK2, Is this procedure correct?

1) Flash the 5.01 stock firmware N910TUVU1COD6_N910TTMB1COD6_N910TUVU1COD6_HOME.tar .md5 (including the desired bootloader)

2) Boot into stock firmware

3) Select Factory Reset (to execute the data wipe capability in 5.0.1)

4) Shut down and boot into download mode.

5) Flash TWRP

6) Flash 5.1.1 N910TUVU2DOK2 (previously modified to remove boot.img from the tar.md5 file?)

( would this step 6 cause the full functionality of 5.1.1 to be available, but with the non-broken bootloader?)

Questions:

1) Why is the bootloader causing problems with random reboots? During the boot process it corrupts memory?

2) is the problem in internal memory or EXT-SD or both?

3) does the 5.1.1 bootloader continue to corrupt the memory? I.E. if the memory corruption was repaired by other means, would it soon be corrupted again by the bootloader?

4) The T-Mobile 5.1.1 stock ROM has been out since August. This seems like a huge bug. Nobody has seen this issue until now? Or is it specific to rooted devices or the Beastmode kernel?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
boot loader is the problem

i was using an older version of 5.1.1 bootloader for months and everything was fine but as soon as i upgraded to latest, i started having problems

internal and ext are both fine but just to be safe and start fresh i recommend formatting internal storage

boot loader was not executing internal memory properly hence all the errors,older bootloaders are perfect and you wont face any problems

i haven't faced a single problem in 2 days

there are many versions of 5.1.1 stock roms with different names but i think the latest once is the culprit, so stay away from 5.1.1 recent builds and only flash 5.1.1 base band but try to keep 5.0.1 boot loader.

your procedure seems about right but my tar automatically executed internal memory format and not just factory reset

those are two different things

factory reset formats /data

internal memory formats /system /data /cache etc

so if you tar doesnt support inernal mem format

my suggestion would be to install twrp after 5.0.1 flash and go to wipe>advanced and wipe internal storage

dont flash 5.1.1 again unless you are sure its bootloader is working properly

you just need 5.1.1 baseband to have a well functioning phone
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] McMichael96:
I believe you when you say it works for your variant, but man I don't think it's going to work for our t-mobile variant. Even though they're really similar, I don't believe the Canadian variant got the security policy update that prevents downgrading like we did.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
What version of ODIN did you use to flash?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
3.10.7
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
How did you determine this?

(i think the reason why this tar worked and back flashed the boot loader is because it formatted the internal storage while the tar was being executed)

Did you see something in during the ODIN flash?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
tbh i did not pay attention but this is the only tar i have which formats my internal storage every single time without fail

once i forgot this and lost a bunch of my pictures

this is the only tar that lets me go back to 5.0.1 bootloader

other 5.1.1 tars flashed sucessfully but bootloader did not change
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
Interesting. I have a N910C, I haven't tried going back that far in versions BOE2...

Downloading now.

Noticed it's smaller than the N910W8VLU1BOE2_N910W8OYA1BOE2.zip you used.

I'm going to look and see what the differences are.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] rajatkuthiala:
Can cross flashing work properly?

Hey,

I found this thread online where they cross flased N910W8 rom to N910T. Can you please confirm through this link whether they also flashed bootloader.

http://xdaforums.com/note-4-tmobile/development/port-unmodified-port-sm-n910w8-lollipop-t3072920

Thank You
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
[MENTION=4675246]Ashwin Prabhunerurkar[/MENTION] Do you have any more 5.0.1 firmwares?

Looking to see if they are all in this format. With the .ext4 images and the tz.mbn

The N910C BOE2 version is not like this. Downloading BOE1 to see if it is like the screenshot

Or is the format for SnapDragon ?

EDIT: Figured out it's Snapdragon format.

Still curious if all firmware have the tz.mbn in it.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
They did not

Remove all images except for "system.img.ext4" from the Odin tar.md5 archive (keeping the *.mbn files will hard brick your device! Don't do it!)

Factory reset

Flash the new tar.md5 (containing only system.img.ext4) using either Odin or Heimdall
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] thiennvbk:
I have the same think like you. Because after have problem with DOK2, I have been try to flash cog2 but it fail in odin,and have a notice in download mode like that "Odin fail, binary =2 >1".

I think t mobile haven't allow we downgrade the firwame.

I haven't try with cod6.

Any one have successfull with cod6?!
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] rajatkuthiala:
What approach are you using to rollback the bootloader?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
I have the N910C. It is not possible with anything I have found yet.

So far the OP has had success with going back from the COK3 on the N910W8
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
Ok so here are my conclusions

1)when i was on COK3 5.1.1 bootloader i was not able to flash and downgrade any other 5.1.1 bootloader

2)when i downgraded i was not using note 4 stock rom.i was using a note 5 port echrorom v24 and ael kernel 7.8

3)i think the canadian note 4 also has security feature or else i would have been able to downgrade to other 5.1.1 bootloaders too

Now finally i need a canadian note 4 user to flash the 5.0.1 firmware i posted and tell me if he is able to rollback his baseband,bootloader and gets his internal storage wiped

So look around if you find any testers

As i have tried multiple times and i am still able to downgrade
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
[MENTION=4351374]shaggyskunk[/MENTION]

Can you help us out here

Read the first post and the post above this to get an idea of whats going on
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
My 5.0.1 and 5.1.1 firmware are exactly the same

This is the first thing i did as i thoughtthe BOE2 must have something special as it can wipe internal storage
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Ashwin Prabhunerurkar:
i have pit files for W8 and T variant now

so i am re flashing 5.0.1 and re partitioning to finally get rid of read errors

if everything goes well

i will post the pit files as even after downgrading bootloader i was rarely facing the read problem so re partitioning should fix everything
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dolphin17571:
I'm eagerly awaiting ... any good news???
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] Enilo:
Could I get step by step directions on how to do this? Not as savvy as others in this and I just want to make sure I get it right. If I could get instructions from start to finish it would greatly help.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] McMichael96:
I'm checking this thread eagerly, I really wanna love my phone again. But after trying multiple ROMs including stock, with them all rebooting randomly (and often times refusing to boot with the emmc error showing) it's hard to. I checked, and my phone is actually under warranty but the knox counter is tripped (of course). I feel ripped off because this is Samsung's fault, not mine or any of ours. It's their official firmware (particularly the boot-loader) that did it.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] mtran1977:
Download the app Wake Lock - Power manager from Darken in the play store. Set it to run on boot, and choose power level 4 - partial wakelock. This prevents the phone from going into deep sleep, but at least it won't lockup or reboot.

This app has made my phone usable again until someone figures out the real fix.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] thiennvbk:
Thanks for your app you show. Hope that app is usefull. I already install and checking it.:)

---------- Post added at 06:01 AM ---------- Previous post was at 05:57 AM ----------

Now still haven't right way to fix it. Every body is fiding the solution. So be kind and wait until we have the right fix, then will have the step by step direction for every one.

---------- Post added at 06:08 AM ---------- Previous post was at 06:01 AM ----------

We are know that the fault is belong to samsung firwame, but doesn't all device are got into this problem, so they haven't action. I think the problem also from T mobile. If they have a fix it,or allow we downgrade to 5.0.1 when get error in 5.1.1, we also haven't get the trouble like that. I have been contact to T mobile technican support, and they said that they also received a lot of complain from customer. They will check it. Hope that they will have a fix for our problem.
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] moqueet:
Thanks bro!!!!!
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] McMichael96:
The pit file for T-Mobile unfortunately has a "secure checK'/"auth" fail.. I was really hoping it'd work
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] rajatkuthiala:
My phone finally died today. I reinstalled stock OS using samsung Smart Switch. It booted up properly and I installed all my applications. Then i tried to reboot my phone. After that its not starting anymore. I tried to remove battery and holding power key. Then putting the battery back and starting it. took out sim card and s-pen too. Tried connecting to charger. Nothing is working. The only thing that works is when i press the power button and leave it there for few minutes, the phone warms up a little bit.

Any help from you guys would be appreciated.

Thanks
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] thiennvbk:
Don't worrie.I have been get into the trouble like you. And have the same think that the phone die. But two day after I turn on, It normal. Of cose have the problem like this topic. But the phone still can turn on.:)
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] dolphin17571:
Do you think that we could have any chance to unblock the bootloader using z3x box? Did anybody already try it?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] ouyangmland:
N910T 5.1 OK2

How to downgrate to NK4 4.4
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] bgtvfr:
This problem just started on my phone and couple days ago I'm really hoping there a fix. If only when Odin to stock using dok2 firmware would format everything like cog2 did this problem would not exist device sm910t anyone found a fix?
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] sunnycee:
I need to downgraded my T-Mobile Note 4 (N910T) from 5.1.1 to 4.4.4, but Odin will always fail with emmc read error, pls any new info as to how to achieve this? Thanks
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] ayeitschris:
Once your on 5.1.1, you can no longer downgrade to 4.4.4 or 5.0.1
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] sunnycee:
Thanks [MENTION=3546260]ayeitschris[/MENTION].

I read online that they locked the bootloader on 5.1.1, Samsung should better provide means of unlocking the bootloader just like htc, we paid for the phone, so we should be allowed to used it to the fullest
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] mtran1977:
I think I fixed the mmc read problem on my phone. Please see this post.

http://xdaforums.com/showpost.php?p=66879466&postcount=10
[T-Mobile Galaxy Note 4 Q&A, Help & Troubleshooting] sttylo:
dealing with this since OTA security upgrade since august.

if you don't have the time to wait for it fdor two days to allow you to reboot then get battery off and put it in a zip lock bag in the freezer for about 10 minutes, put battery back and it will start, why ? I have no Idea but works every time.
[P3600 General] hhacker78:
Dear guys,

I have just installed the Touch Dialpad on my D810. I found that I couldn't either make or receive video call as before!!

Is there a way to fix it?

:(
[LG Optimus 3D] Babysav28:
Messed up rooting phone, now volumes and power turn it on to tag laying on his back it says system recovery but the options reboot update adb reset and all that don't do anything at all. Is my phone fried? Hhhheeeelllppp
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
did anyone try this rom,maybe bootloader unlocked

http://www.sammobile.com/firmwares/database/SM-N910C/
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
No,still locked
[Galaxy Note 4 Q&A, Help & Troubleshooting] lnt976:
??

Envoyé de mon SM-N920C en utilisant Tapatalk
[Galaxy Note 4 Q&A, Help & Troubleshooting] krumbs:
I installed the G version of this, then TWRP via Odin and then managed to root using the beta version of SuperSU. Took couple of attempts, but it worked.
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
yes,no problem with twrp,I installed it via odin and restore to my old rom with twrp
[Galaxy Note 4 Q&A, Help & Troubleshooting] GrippingSphere:
Did you install a modified kernel for rooting? And what version of SuperSU did you use? Thanks.
[Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
Did you restore old COJ5 modem?
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
no, I tried to flash 4.4.4 and 5.0.1 stock rom with pit and without pit file(one part and four parts). and then I tried to flash only bootloader of kitkat and 5.0.1.

when odin said "fail".I have flash twrp and return to my old bacckuped rom(wanamlite)
[Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
I was just looking at your screenshot of About Device. It shows COL2 but Baseband of COJ5.

Wondered how that happened Thought it show be COL2 arfer ODIN flash.
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
N910CXXU2COL2_N910COLB2COL1_N910CXXU1COJ5_HOME.tar.md5

I did not understand,what do you mean .above is full name of sammobile rom when you extract of downloaded zip files.

as you see the rom is still COJ5
[Galaxy Note 4 Q&A, Help & Troubleshooting] dicksteele:
Wow that came out big.

The version of the ROM is the Build Number. That's the COL2

The Baseband Number is the Modem.

Looks like they didn't update it.

---------- Post added at 11:06 PM ---------- Previous post was at 11:00 PM ----------

Looks like they put two out yesterday

h&&p://www.sammobile.com/firmwares/database/SM-N910C/THL/

Model	SM-N910C

Model name	GALAXY Note 4

Country	Thailand

Version	Android 5.1.1

Changelist	6035384

Build date	Thu, 29 Oct 2015 23:32:39 +0000

Product code	THL

PDA	N910CXXU2COJ5

CSC	N910COLB2COJ5

Model	SM-N910C

Model name	GALAXY Note 4

Country	Thailand

Version	Android 5.1.1

Changelist	6035384

Build date	Fri, 11 Dec 2015 09:50:38 +0000

Product code	THL

PDA	N910CXXU2COL2

CSC	N910COLB2COL1
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
yes

http://www.sammobile.com/firmwares/database/SM-N910C/THL/
[Galaxy Note 4 Q&A, Help & Troubleshooting] mudur1998:
why you do not download it and try to flash