yashsingh1/xdaforums huggingface dataset:
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
I can suggest two ways to verify your bootloader version (modem also). I would assume you know that baseband is the same as modem. 1) There is a PlayStore app that will give you a great deal of info, search for Samsung Info app. 2) Would to be to use Terminal Emulator commands to determine the versions of bootloader and modem. If you are on TWRP it is built into the recovery. Otherwise it is downloadable from the PlayStore as a normal app. To determine bootloader version run

getprop ro.bootloader

for the baseband/modem run

getprop | grep version.baseband

For a KK ROM you could probably bypass upgrading bootloader and modem if you have a custom kernel, as previously noted. Most of the reports I have read say you need to be on KK bootloaders and modems to run 5.x.x ROMs on the i747/i747M devices. (There has been one, maybe two, that say they are running LP ROMs with 4.3 bootloader and modem and having no issues.) I even saw many reports that the most recent CM11 updates need KK bootloaders and modems.

You should have no issues running 5.1.1 on your device. I have been reading good reports on the unofficial version compiled by matrixzone over the past few weeks. For most people the various issues were worked out. He is no longer updating it now that there are official nightlies. However, people are posting comments about the official nightlies in his thread. Read maybe the last 5 to 10 pages. You will probably need to be on the 4.4.x bootloader and modem, as mentioned above.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dtourond:
Okay, I'll use that app in a bit when I can get my hands on the phone.

I'm still a bit confused though. My original question that I had posted was about trying to find out which boot loader among the list that the OP has in his Dropbox is the latest version. I was given a link to a SamMobile page and for a while, I thought that was the list of boot loaders. However, it seems like that is a list of modem images and not bootloaders (see picture 1).

View attachment 3302252Picture 1
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
Sorry for causing you confusion. I provided the SamMobile link not as a source of the bootloader but to show that those posted in the OP are no longer anywhere near the latest. Those listed in the OP are Jellybean and older bootloaders.

SamMobile is providing ROMs that are Odin flashable, you would be downloading the full ROM, not just the bootloader or modem. You can verify this by the size of the download; ROMs would be at least 600 MB, if not more. A bootloader would much smaller. As far as the version numbers (I747MVLUEMK5) go, for more recent bootloaders and modems they will match each other and the ROM, I think.

Unfortunately, as stated in my first reply, I don't have links to a file with only the bootloader and modem. You would want to flash these together to avoid bricking your device. DocHoliday77 has a thread with what you want, but he removed the links. I guess it would be possible to extract the bootloader and modem from a SamMobile ROM download, others have done so, but there may be risks I'm not knowledgeable enough to warn you about.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrrocketdog:
might this help ?

http://xdaforums.com/showthread.php?t=2808654

and to get to get to nj1 (?)

http://xdaforums.com/showthread.php?t=2985006

"all i can really do , is stay out of my own way and let the will of heaven be done"
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
Not for the i747M

I'm pretty sure he is on the i747M instead of the i747, his device has the MK5 baseband. If that is true, him having the i747M, then those would be bad for the health of his device.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrrocketdog:
OOOOPS. good catch [MENTION=5575315]dawgdoc[/MENTION]. my bad.

"all i can really do , is stay out of my own way and let the will of heaven be done"
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] slcdroidpunk:
Why the big difference in zips that seem to be doing the same thing? I was reading this thread for updating bootloader/modem to MJB. The first flashable zip is 20MB. The zip in this thread is 1.2M (also, non-drop box links appear to have been hacked )
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] ocd_amp:
Unless you are looking to flash a new Baseband, is there a point to flashing a new Boot loader? Most custom Roms will work without the need to do so, or is that incorrect? The newest Bootloaders trip Knox do they not? Just trying to make sense of WHY one would need to update their Bootloader?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] slcdroidpunk:
My understanding is that the newer Roms may require newer bootloaders. Also, there is some conjecture ( maybe not hard science ) about various modems being better or fixing certain issues - and you have to keep your modems and bootloaders in sync.

that's my take ... not really an expert ...
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] ocd_amp:
Using a Galaxy S3 I747M here with Carbon KitKat 4.4.4

I747MVLDLK4 BOOTLOADER from 4.1.1

I747MVLDMF1 BASEBAND from 4.1.2

This is doable I believe even though Bootloader is not matching the Baseband, but it is below 4.3.

I believe after 4.3, there is no going back - but there is the danger of tripping Knox and other issues.

From what I have read on various posts, if you flash a 4.3 based Baseband, without already having a 4.3+ bootloader, You will Brick. Is this correct?

The OP needs to put some Warnings there. I believe this is a Dangerous post and someone is guaranteed to Brick their device.

From my own notes this is what I can say :

Don't Install ANY modem version HIGHER than your BOOTLOADER.

Once Higher version BOOTLOADER is Installed, DO Not Attempt to Downgrade Bootloader, or Baseband.

If this is correct, someone Validate this post. Thank you!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
There are actually two 4.3 bootloaders for the i747. One locks the bootloader so that it can not be downgraded, this is the MJB bootloader that came with the AT&T official release of 4.3. Prior to the official release there was a leaked release of the 4.3 ROM by AT&T. It had the MJ2 bootloader and modem. You can downgrade either of them. The MJ2 bootloader does not require a matching modem. I have been running the MJ2 bootloader with MJB modem for over a year with no issues. It is even possible to stay with this pair or the MJB/MJB combo for most KitKat ROMs that say they need a KitKat bootloader and modem, IF you are using either Ktoonsez' custom kernel or ibuddler's kernel.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Aqua1ung:
How can I tell what bootloader I have please? Note that it does not seem to be the same as my baseband (UCUEMJB). All I want is to flash UCUFNE4 (and then UCUFNJ1).
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
True, baseband (modem) does not always match the bootloader. To check your bootloader version you could use the Phone Info -- Samsung app by vndnguyen from the Playstore or use commands in Terminal Emulater.

getprop ro.bootloader

you can check the modem from Terminal Emulator with

getprop | grep version.baseband

or refer to the Phone Info app.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Deviatorz:
Hey guys. I am trying to update my old S3 bootloader and modem today. I haven't been in the S3 scene for a while and after some reading it seems that I should be careful updating the bootloaders, that flashing an older bootloader when on a newer version can lead to a bricked device. Luckily my S3 is on an very old bootloader and modem (LK4 & LL1 respectively). I am looking to install 4.4.2 or lollipop roms on this guy so I am curious which bootloader would be a good choice? Seems like MJB isn't. Any safe one that won't cause my device to brick later on?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
Since you seem to be referring to the i747 and not the i747M:

If you want to get to 4.4.2 or 5.x.x ROMs on your device you are correct in speaking of updating your bootloader and modem. From all I have read it is best to do so incrementally, that is going through each in sequence. I believe this is recommended because after 4.1.1 (DLK) AT&T no longer released full ROMs with any change. Everything since has been patches building on previous updates. You can mix and match versions only up to 4.3 (MJB). (I am running the MJB modem and the MJ2 bootloader, the pre-release 4.3 bootloader.) Once you are at 4.3 or beyond do not downgrade bootloaders, even if it is from flashing a stock rom. Once you are at the NE4 versions of bootloader and modem they must stay paired at equal versions. The only bootloader and modem past NE4 is NJ1, still built for Android 4.4.2.

There are 4.4.x TouchWiz ROMs which run well on the MJB or MJ2 bootloader and modem >> IF you are running a custom kernel. The same seems to apply to AOSP/CM based 4.4.x ROMs, probably without the need for changing kernels once the ROM is flashed. The 5.x.x ROMs, all AOSP or CM based, seem to need at least the NE4 bootloader and modem. (I have read reports from two people that they run the recent release 4.4.x and 5.x.x AOSP/CM on MJB with no issues.)

BTW, while you are at 4.1.1 you should seriously consider utilizing the free carrier unlock found in the forums. You may never intend to change carriers or utilize the device overseas, but it is better to keep your options open.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Deviatorz:
Thanks for the reply. I meant the i747M. I forgot this was also the AT&T forums. Would this still apply?

PS: I already unlocked the phone from a while back, thanks for the tip!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
It would be very similar for the i747M, but not the same versions. I think your 4.3 was MK1; there may have even been more than one 4.3 release for the i747M. There were quite a few 4.4.2 releases for the Canadian variant; everything from ND1 to OB1 with at least three between. The same truths hold for not downgrading without bricking once you are on 4.3, likewise about mixing versions of modem and bootloader once you reach 4.4.2. [MENTION=4673498]audit13[/MENTION] or [MENTION=5511100]mrrocketdog[/MENTION] may be able to confirm, I think they both had the i747M in the past.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] audit13:
The safest, although it is the most tedious method, would be to flash back to a completely stock LK4 Samsung ROM using desktop Odin and then run OTA updates until you have the latest ROM on your phone. Once you have updated as far as possible, simply flash a custom recovery (CWM, TWRP, Philz) onto you phone and flash a new ROM and Gapps.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Deviatorz:
Thanks for the replies! I will follow these suggestions, I don't want to risk it. But just to confirm, once I update to the lastest firmware, I will not be able to downgrade the bootloader? I don't plan on doing that anyways, but most custom ROM's don't have bootloaders and modems packed in anyways right?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] audit13:
Yes, you cannot downgrade the bootloader once you have updated beyond 4.3. I don't recommend mixing and matching bootloaders either.

Yes, most custom ROMs do not include a bootloader and/or modem.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Dave_N:
Hey guys. I have a Samsung Galaxy S3 I747, the AT&T version from the US. I want to use it on rogers and bell here in canada. It currently has the I747UCUEMJB bootloader installed and I would like to flash the I747MVLUEMK5 bootloader, so it can work on bell and rogers. Should I try flashing the bootloader with CWM 6.0.4.7 or will this brick my device? I flashed Liquidsmooth kitkat and I love this rom. :)
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] canodroid15:
NO! DO NOT DO IT!!!! I747M & I747U are NOT cross compatible. You WILL BRICK IT!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Dave_N:
Thanks for a quick reply. I guess this phone can only be used in the USA then. I'll save it in case we go for a trip to New York etc. Thank God I didn't flash the bootloader, whew. :)
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] audit13:
You could try to purchase an unlock code from ebay.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Maddogg_cz:
Hi,

I'm on I747MVLUEMK5 bootloader and modem right now, runing Oct lollipop rom on my i747m. I am having some cell signal issues and want to try different modems and wondering what are my options? I know I cannot downgrade. Can I just try any of the newer modems or I brick the device with flashing 4.4.2 modem while on 4.3 bootloader? I know the best way to upgrade bootloader and modem is go incremental step by step , but separate modems and bootloader for i747m are imposible to find. Is it safe to flash I747MOYAFNF2 stock rogers rom? It should give me 4.4.2 bootloader and newer modem. Then I would have a chance to try out 4.4.2 modems and see which suits best. Do I understand it right? Thanks
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
It seems you understand it correctly. I have always seen others recommend incremental updates for bootloaders and modems, so I have always recommended the same. That being the case I would have said go to NE6 for Rogers and then on to NF2 if you wish. I would do both the bootloader and modem. My understanding is that prior to 4.4.2 the bootloader and modem versions did not need to match, but as of 4.4.2 they do. If you flash the NF2 stock rom you will get both the NF2 bootloader and modem. At this point do not downgrade to NE6. If you want to try the OB1 or OB3 modem you must also go with the corresponding bootloader. As you try each do not go back to a previous version.

In short, try the NE6 stock ROM. If issues are resolved all is good. If you still have cell signal issues, try NF2. Go on to OB1 if signal issues are not resolved, and finally to OB3 if needed.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Maddogg_cz:
So I've tried to flash NF2 , but that always end up with an error in ODIN. Then I tried OB3 and that worked fine. Flashed twrp and rom I've been using and it seems fine.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
Glad to hear you sorted it all out.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] hgarca089:
Which ROM did you flash? I have same bootloader/modem version OB3 and need to flash a stock rom to use it with Fido/Rogers so far only CM roms have worked ....

thx
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Maddogg_cz:
I flashed this http://www.sammobile.com/firmwares/download/57046/I747MVLUFOB3_I747MOYAFOB3_RWC/ to get to OB3 bootloader and firmware. Then back to OctOS .
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] :
I installed 5.1.1 Cyanide and my baseband is unknown - I tried all the modems from this thread http://xdaforums.com/showthread.php?t=1831898 for i747m and still no luck.

I don't use the phone for anything at all but I'd like to use it for videos or as a ALarm device but -no sound coming out of the device. I assume this is bootloader or modem related ? cuz Wifi is working fine.

Only problem is no sound whatsoever.

If I try to play youtube videos- it says "error loading touch to retry over and over again"

---------- Post added at 01:28 PM ---------- Previous post was at 01:27 PM ----------

oh and I tried plugging a wire in the jack and tried youtube and got the same error again "error loading touch to retry" browsing and all works but no sound
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] :
Anyone know anything? any pointers ?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
Youtube problem shouldn't be related to bootloader and modem, if Wifi were not working then maybe modem related.

What is your current bootloader. Important for us to know before flashing anything else. Mismatching bootloader and modem could brick the device, downgrading will probably brick the device.

Unknown baseband would be modem related. The simplest solution may be to flash a stock ROM. Be sure and to not downgrade bootloader or modem. The surest solution may be to go to sammobile and get the ROM that matches your current bootloader, or the one that you that matches the newest of bootloader/modem you have ever flashed. With stock ROMs matching modem and bootloader will be flashed. Flash it with Odin/Heimdall and recheck your baseband (baseband = modem).
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] :
I have installed Cynide 5.1.1 and modem is I747MUMUEND3 - and baseband comes up as - unknown - my device was hard bricked and I was able to bring it back to life with SD card method.

Now after bringing back to life I went to above mentioned ROM and modem. Wifi wasn't working so I installed that above mentioned modem. Wifi works but there is no sound. If I touch volume up or down - no sounds come at all.

Will putting back stock rom - fix the issue ?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
I have read where it has worked for others with similar problems. The biggest catch is that you are wanting to run a 5.1.1 rom on 4.3 bootloader and modem. It is very probable that you need to go to a 4.4.2 bootloader and modem. The i747 and Canadian i747M ROMs based on Cyanogen or AOSP since late in the 4.4.2 version development, as well as the 5.x.x and 6.x.x based ROMs, have needed 4.4.2 bootloaders and modems. These are readily available for the Canadian i747M phones, but it looks like you have a Telcel i747M. I don't know if you the Canadian stock ROMs will work on your phone or brick your phone.

I would suggest retrying the ND3 stock ROM for your device. If that does not work then you would need to search and see if it is safe for you to use the Canadian stock ROMs. ( [MENTION=4673498]audit13[/MENTION] any info on this?) If it boots and all works as it should with stock ND3 ROM then enjoy and go no further. You may find that going back to stock from a 5.x.x or 6.x.x ROM will require a factory reset from the stock recovery before the device will boot.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
deleted - problems posting, post made multiple times,

I truly am not attempting to pad my post count.

Moderator, please remove excess posts.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
deleted
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] :
Is there a way to check what bootloader I have ? This is a Canadian Rogers phone - which I had unlocked long ago to work on any network. (that required unlocking /downgrading the bootloader IIRC) and then I installed wrong ROM on it and phone got hard bricked and I bought a Nexus 5- I recently used the SD card method to bring the phone back to life with stock rogers ROM - n then I installed Dark Spirit and now Cynide - with no sound working in neither (Dark spirit or Cynide)

I downloaded Skipsoft android toolkit but that doesn't have anything that can fix this problem though.

I didn't mess around with bootloader because I didn't even know the version on the phone and baseband just shows "unknown"

Even if I wanted to flash stock ROM i'd still need to know bootloader version right?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] dawgdoc:
Hopefully I don't make multiple posts this time. :o

It would be best to know the bootloader version. You can check it with a command in Terminal Emulator. The command is:

getprop ro.bootloader

There is also a PlayStore app that checks this and much more. It is Phone Info *Samsung* and is by vndnguyen.

The reason I made the Telcel comment is that the only ND3 Rom I saw on the Sammobile page was for the Telcel variant.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] wajihbhat:
I have the bootloader version (I747UCUFNE4) is that my bootloader is updated or need to b update????

kindly help me....!
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] mrrocketdog:
if everything is working fine then i personally would leave it alone. but ...... i believe there are two newer versions nj1 and nj2 if i'm not mistaken.

"err on the side of kindness"
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] sebas2906:
i accidentally install the wrong baseband, ive installed the one that cant be downgradeable.... so i dont know what baseband i need rigth now and i wanna know if is possible install another baseband without brick cause i dont have signal
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] :
I had to reinstall the basic Rom the phone came with by installing the Rom on the memory card and tricking the phone into thinking that it's the hard drive.

This YouTube video helped me.

https://youtu.be/8MnikrpUKZw

Hope this helps you.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Tmobilefan906:
its been a while for me...but what was the last updated bootloader (baseband) for the att galaxy s3 i747?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Deadbeatpenguin:
Advantages if at all any?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] rocky28297:
A noob question......i am using omega rom 4.4.4 kitkat and i tried to install "note 7 x rom" but it got stuck at the bootloop despite of clearing caches and dalvik.Then i read abt updating bootloaders.

Will my current rom work if i update bootloader to marshmallow? Are there any risks with updating bootloaders?will the new rom get installed after i update bootloader? Pls help
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] audit13:
Before flashing anything, I recommend confirming the bootloader currently installed on the phone as the phone may already be running the latest release.

Did you perform a full system wipe before flashing?Not wiping can cause the new ROM to hang.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] rocky28297:
I deleted system,data,cache and dalvik (without internal and external storage) and tried installing this rom 7 times but didn't succeed. I have N910g version note 4 and in this rom's forum i read that this rom worked for some 910g users, not all. I have flashed n910f model roms and they work fine.Can i try n910f with its kernel?

---------- Post added at 05:08 AM ---------- Previous post was at 05:07 AM ----------

Also,i was not able to restore my touchwiz rom backup after updatimg bootloader? Is it bcoz of my bootloader?my phone wont go ahead after showing samsung note 4 text
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] Alexandre-P:
Hi!

This is a D2LTE forum, for Galaxy SIII AT&T-variant model. If you flash something from this forum (be it a bootloader, a kernel, a ROM, a radio/modem...) to your device which is not of this variant, then it is most possible you may/will break something. I believe the bootloader is one of the most crucial part of a phone; break it or flash a bootloader not made for your phone variant, and your phone won't boot.

Even if you try restoring a ROM backup, this generally does not include the bootloader part. So no, reverting to a previous NANDroid backup will not revert to your previous bootloader.

I would advise you post in the Galaxy Note 4 forum if you do have any trouble with your bootloader. They may have solutions to help you repair or upgrade your Note 4 bootloader.
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] CrimsonBloodfang:
Hello, does an official OTA Update by the device manufacturer also updates the bootloader?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] proza:
Mine is Canadian i747m in stock Android 4.3 with Baseband I747MVLUEND2. How/Where can I get a newer bootloader?
[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] audit13:
Flash the latest stock rom from sammobile.com with Odin.