Clarifications about KNOX and the S3 - T-Mobile, Samsung Galaxy SIII

AFAIK nobody has asked anything about KNOX on the T999, so I have a few things I want to know before updating my phone to 4.3.
I bought my phone off-contract at full price and its flash counter has already been incremented many times from rooting, so I obviously don't care about setting the "KNOX warranty void" flag either, nor the enterprise-grade security features KNOX provides.
However, there is a rumor that once the KNOX warranty void flag is set to 0x1 you can't upgrade the ROM anymore, not even via Odin. Is this actually true? I know you can't OTA unless you're stock, but I don't care about OTA since I'd just upgrade via Odin anyways. But the fact you can't even upgrade via Odin seems a bit far-fetched.
Another variant of this rumor that seems more believable is that updating to a KNOX-enabled ROM also updates the bootloader to a KNOX-enabled variant, and that you can't upgrade to new KNOX-enabled ROMs if you decide to downgrade to a non-KNOX ROM after the bootloader has been updated. But if I never downgrade, can I continue to install updates, assuming Samsung releases ROMs for the S3 after 4.3?
Can anyone shed some light on this?

I somehow can't trust the first one. However the second one sounds more plausible. Anyway doc Holliday has removed KNOX from the most recent leaked Stock Rom. So this question becomes moot really.

Perseus71 said:
I somehow can't trust the first one.
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Click to collapse
Which is exactly why I asked this. I just wanted some more opinion.
Perseus71 said:
Anyway doc Holliday has removed KNOX from the most recent leaked Stock Rom.
Click to expand...
Click to collapse
And does this also mean that the bootloader isn't KNOX-enabled?

jim45 said:
Which is exactly why I asked this. I just wanted some more opinion.
And does this also mean that the bootloader isn't KNOX-enabled?
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Click to collapse
I don't think so. I flashed that Leak to test out the features. Afterwards flashed back my regular AOSP Rom.
NOTE - With the Leak, some reported that the Bootloader didn't get updated. I explicitly asked as well. If you are concerned with Knox'd Bootloader, you can Flash back UVDMD5 Bootloader too!

Here's what I know so far.
First, we do not have to worry about the Knox counter. One of my sources sent me a pic of their download mode and it was not there.
Second, I have reliable doubts that our official release will NOT include Knox. It's only included now for ease of using the same builds across multiple devices during internal testing.
Third, the bootloader is not included in any of the leaks. I do have a copy of it and have been considering releasing a recovery flashable firmware update, but haven't decided yet if I want to do this.
One of my sources ran into a problem at one point and soft bricked. Samsung simply connected remotely and flashed the firmware via Odin.
As for not being able to downgrade or flash certain things, I do not think this is the case at all. If you do something Knox doesn't like, it will lock down the secure containers it uses and you will not be able to regain access. I do not belie e it will restrict you from flashing something else, old or new, firmware or Rom, etc.
There is still a lot I do not know about it, but the information is out there. I stopped putting time into it when I found we probably won't need to worry about it anyway.
A quick Google search will net you more info, but if you really want an education on it I'd suggest visiting the S4 and Note3 forums. S4 users have been dealing with Knox longer than anyone, and the Note3 is the first device to ship with it fully implemented.
Sent from my SGH-T999 using Tapatalk

Related

[Q] "Knox" firmware and the m919 version?

I have read (<here> and <here>)
about new firmware versions that will not allow resetting the counter (warranty flag) to initial conditions when restoring to stock after after unlocking or rooting.
If the phone developed a hardware problem, warranty repair could be denied.
The firmware version "MGG" and beyond are reported to have this problem.
Questions:
Does this also apply to the m919 T-Mobile version?
Has anybody seen it on an m919?
Is it going out with an OTA update?
Or is MGG specific to the i9505?
I am shopping for a GS4 m919, and I want confirm that it has the "pre-MGG" firmware version before purchase.
Questions:
Is the ID contained in the "Baseband" ID string in the phone information?
Are there different identifier strings used on the M919?
The T-Mobile S4 has not received the KNOX Bootloader, it will most likely come with the 4.3 update. If anyone is on stock, I would recommend you guys disable OTA updates as you may get automatically updated to 4.3 with the KNOX bootloader.
for once...im dreading an update from tmobile
If I've already rooted and installed a custom recovery (Clockwork Mod), and nothing else, does anyone know if the 4.3 update with KNOX will still be usuable? In other words, will the phone still get an automatic OTA update and will that update install correctly?
Sent from my SGH-M919 using XDA Premium 4 mobile app
DigitalHeretic said:
If I've already rooted and installed a custom recovery (Clockwork Mod), and nothing else, does anyone know if the 4.3 update with KNOX will still be usuable? In other words, will the phone still get an automatic OTA update and will that update install correctly?
Sent from my SGH-M919 using XDA Premium 4 mobile app
Click to expand...
Click to collapse
It wont let you get the update it will pop a box up saying unable to uodate your device has been modified. . Try to check for an uodate youll see what im talking about... I went back to stock just to see if there was anything for updates which there wasnt andbwent to reroot and installed su abd it didn't flash correctly thru odin said to heck with it till the am checked for an update for giggles in the am and wouldn't even check
Sent from my SGH-M919 using Tapatalk
i'm glad I read this thread. i was going to wait until i tried the stock 4.3 update before deciding to root and install custom ROMs. With KNOX coming, I'm just going to root ASAP. I like PA on my Nexus4, so I'll probably go with that for my S4.
So you guys are saying the new update with "knox" won't allow you to reset the counter and only that or will it stop you from completely rooting and installing custom roms?
Sent from my SGH-M919 using Tapatalk
futty said:
So you guys are saying the new update with "knox" won't allow you to reset the counter and only that or will it stop you from completely rooting and installing custom roms?
Sent from my SGH-M919 using Tapatalk
Click to expand...
Click to collapse
Let me clarify some things. The KNOX processes and functions are already on the stock ROM, most devs remove them, though. So many of you with custom ROMs haven't seen anything related to KNOX.
What the new T-Mobile update (when it gets pushed out) is most likely to come with is a "KNOX Bootloader" which will introduce a thing called "KNOX Flag" which is similar to the old counter we're all used to. This is the counter that @Chainfire was successful in resetting with his app, Triangle Away.
Unfortunately, @Chainfire or anyone else for that matter, has not been able to reset the KNOX flag.
The KNOX flags is this:
0x0 = You have not tripped the KNOX flag.
0x1 = You have tripped the KNOX flag.
Again, once you trip that flag, rooting, flashing a custom recovery, etc.. there is NO way to reset it as of now. And any KNOX functionality on your phone will not work. But the worst part is Samsung will refuse warranty on your device if they see a 0x1 in your bootloader.
Another thing.. on the new bootloader, if you try to downgrade, even with an official Samsung firmware, it will fail and you will trip the KNOX flag.
So once you're on the new bootloader, there's no going back.
There's been speculation that there's an eFuse at play here.
Anyway, this is the reason why I am suggesting you all disable OTA updates and wait until a ROM is built without the new bootloader and all the functions (Wifi, MMS, etc.) are working.
mgbotoe said:
for once...im dreading an update from tmobile
Click to expand...
Click to collapse
Hey, its sammy we have to blame for this one :/ Not T-Mobile lol.
PSSSST! Don't let them know you are dreading it, or they might put it off longer xD
As to the OP.
The KNOX Warranty counter is rumored to be what is called an eFUSE. If this is true, then resetting the KNOX warranty counter will be impossible without taking apart your phone and replacing that specific eFUSE.
However, there are rumors that some root methods DO NOT trip this new counter. Is that good? Yes, is that bad? Yes. For those users who like stock kernels and just wanna root, this is okay for them. But for 99.999999 percent of us who love to flash new kernels and get more from our devices, then it trips the counter.
I personally congratulate Samsung as well as hate them at the same time for this. I congratulate them because what seems to be happening a lot is users flash a million and 2 things to their device having not one single clue what they are doing, thus bricking their 500+ dollar smartphone then claiming it as a warranty claim and getting another one. I also feel they are trying to flex their ego muscles too -.-
I also believe that if you have insurance, this does not apply. It is only for warranty claims. Which like you stated OP, it only means Samsung can choose to deny to repair or replace it. I have read a lot of thread before where users tripped the older binary flash counter, and still were given a new device. I honestly don't know how this is going to play out for the lot of us. For me, my warranty is over in a few months anyhow so i don't really care. But its still kind of a dickish thing Samsung is doing.
I am also hoping that we can extract the contents of the new update and keep our older bootloaders and create a flashable zip with the new update stuff and have it still work. I know there were some issues with the international S4 4.3 update but im not sure if it was entirely caused by the bootloader.
Exel said:
Anyway, this is the reason why I am suggesting you all disable OTA updates and wait until a ROM is built without the new bootloader and all the functions (Wifi, MMS, etc.) are working.
Click to expand...
Click to collapse
Where do you disable OTA updates on a stock S4?
Hitting "Software Update" takes me to a Boolean"Update Now" popup with no other option than choosing Yes, No or Wifi. No option to defeat future updates is offered.
Going into developer mode doesn't seem to add any pertinent options either (correct me if I'm wrong).
Clearly, Samsung doesn't want us to be able to disable updates unless or until we root, which I'm doing this weekend on the basis of this thread.
Reignogleph MMXI said:
Where do you disable OTA updates on a stock S4?
Hitting "Software Update" takes me to a Boolean"Update Now" popup with no other option than choosing Yes, No or Wifi. No option to defeat future updates is offered.
Going into developer mode doesn't seem to add any pertinent options either (correct me if I'm wrong).
Clearly, Samsung doesn't want us to be able to disable updates unless or until we root, which I'm doing this weekend on the basis of this thread.
Click to expand...
Click to collapse
You indeed have to root to disable OTA updates.
Once the update hits im going to extract the system.img to get all the files.
Then explore where all of the Knox crap is and get rid of it.
I know I want be alone in doing this...all who develop for the S4 will be on top of it.
Someone will figure out a way to get around this Knox BS...
Sent from a Insane S4
SICK MADE DEVELOPMENT
alloycowboy said:
Once the update hits im going to extract the system.img to get all the files.
Then explore where all of the Knox crap is and get rid of it.
I know I want be alone in doing this...all who develop for the S4 will be on top of it.
Someone will figure out a way to get around this Knox BS...
Sent from a Insane S4
SICK MADE DEVELOPMENT
Click to expand...
Click to collapse
thats fine and dandy for us with existing phones.. I already removed all the knox crap from my phone, and will update but not kernel and do the same..
But what about all future phones.. If indeed the kernel is locked with knox and there is no way to remove it we are screwed for new phones coming out.
lgkahn said:
thats fine and dandy for us with existing phones.. I already removed all the know crap from my phone, and will update but not kernel and do the same..
But what about all future phones.. If indeed the kernel is locked with knox and there is no way to remove it we are screwed for new phones coming out.
Click to expand...
Click to collapse
I agree. If thats the case....then alot of people will ditch Samsung.
But I have a feeling we will figure out Knox. Its man made so it can be hacked. Who when and how is the question.
Sent from a Insane S4
SICK MADE DEVELOPMENT
that's also why I paid 400 bucks for a T-Mobile sgs 4 and I am using it on at&t... I refuse to pay or support a phone with a locked bootloader.. matter of principle...i would ditch att if T-Mobile had decent service in my area.
Sent from my SGH-M919 using Tapatalk 2

[FAQ] KNOX and you

[SIZE=+1]There seems to be a lot of confusion and misunderstanding circling the forums with regards to Knox and the 4.3 OTA.
This is an attempt to clear things up[/SIZE]
UPDATE: It seems that people can find this thread, but are unable to actually READ the information presented. The most important note here is that if you are on 4.3 firmware, you can flash ANY rom you like. No, you are not tied down or locked into stock only or 4.3 roms only. AOSP roms will work fine as well. Now scroll down and READ EVERYTHING IN THIS FIRST POST.
What is Knox? Knox is both a firmware and a software component. The OS has Knox apps, and the MK3 bootloader has a Knox component too. Having Knox apps does not necessarily mean you have the Knox bootloader, or vice-versa.
How does Knox work? Because Knox is both in the OS (apps) and in the firmware (bootloader) it works in two ways. The OS components prevent attempts to obtain root access and make rooting with these Knox apps a pain in the butt. Fortunately they can be removed. In the firmware component (bootloader), Knox works to prevent the flashing of custom kernels and recoveries. If you flash a custom rom or custom recovery WHILE on the Knox bootloader, your Knox flag will be tripped and your Warranty Bit will go from 0x0 to 0x1. The Knox bootloader cannot be downgraded to, say, the MD4 bootloader because of special protections built into it. If you attempt to downgrade it, your phone will instantly brick.
Can I get root on the Knox-enabled update? Yes. For those of us who DID NOT take the official OTA and DO NOT have the Knox bootloader, we can get root on 4.3 by injecting it and removing the Knox apps. For those WITH the Knox bootloader, you will need to wait until a full stock MK3 tar is available, which we can then use to make an Odin-flashable MK3 stock rom with root injected using the de-la-vega root method.
Can I downgrade while on 4.3? You can flash roms no matter what Android version they are. That is perfectly fine. But you cannot downgrade the bootloader if you have the Knox bootloader, or else it will cause your bootloader to become corrupted and give you a fancy paperweight. Again, for those who DO NOT have the Knox bootloader, you needn't worry about this/downgrading firmware since the Knox bootloader is what prevents you from doing this. Downgrading your bootloader includes: attempting to flash full stock tar of software versions < MK3, etc.
How can I tell if I've got the Knox bootloader?
Boot into download mode (through custom reboot menu, or by powering off then holding Power+Home+VolumeDown and then VolUp when prompted). If you see a line that starts with the following, then you've got the Knox bootloader. I will insert a picture showing how it actually looks soon
Warranty Bit:
Click to expand...
Click to collapse
[SIZE=+1]READ THIS TOO: http://forum.xda-developers.com/showthread.php?t=1788313
It's for the Verizon S3, but it applies to all the carrier 4.3 updates[/SIZE]
I will add to this as more questions come up
I hope the above helps to clear up some confusion. Ask questions if you are still concerned and I will do my best to answer them.
is there any way to make this a sticky @kennyglass123
This is great information man!
http://i.imgur.com/qrByUGN.jpg
[Q] For now, once you have Knox you'll always have knox? What's the possibility of removing Knox?
elephant007 said:
[Q] For now, once you have Knox you'll always have knox? What's the possibility of removing Knox?
Click to expand...
Click to collapse
as of right now none.
elephant007 said:
[Q] For now, once you have Knox you'll always have knox? What's the possibility of removing Knox?
Click to expand...
Click to collapse
No way to remove bootloader Knox ATM.
I've seen several posts mention "tripping KNOX" or "voiding KNOX." What does that mean, exactly, regarding rooting a phone? Does it just mean it voids the warranty if you need to get support from Samsung/Sprint? Or are there other adverse effects?
Mostly just a visible warranty void.
Samsung bought crapple disease. So sad, but its my excuse to buy a nexus.
Sent from my SPH-L710 using xda app-developers app
As said above, a voided Knox is mostly just a highly visible warranty void. Your local Sprint store may or may not care, or the specific Samsung rep that you deal with may not care, but it's easier just to not have to deal with it to begin with.
Does this mean there is already a touchwiz 4.3 ROM we can flash or do we still have to wait?
Sent from my SPH-L710 using Tapatalk
The biggest thing here is the fact that there is no full tar file to restore. So even if you do not care about knox or warranty. If something goes wrong with a flash or anything else you can't use an older tar file let's say MD4 or LJ7 or anything because you will end up with a brick. There is nothing to use to ODIN restore your device. Once you go 4.3 with Knox you have to stay 4.3 and even if you wanted to stay 4.3 and wanted to restore that there is no tar file at this time.
Have a great day!
I have a question I think we talked a bit about the problems the knox bootloader brings into the system. My question is the opposite what does it fix / change?
Im thinking along the lines of somebody modding the update so an old bootloader would be with the new rom would that be an issue? I think i remember hearing something about wifi being the problem but any clarification would be nice.
docnas said:
I have a question I think we talked a bit about the problems the knox bootloader brings into the system. My question is the opposite what does it fix / change?
Im thinking along the lines of somebody modding the update so an old bootloader would be with the new rom would that be an issue? I think i remember hearing something about wifi being the problem but any clarification would be nice.
Click to expand...
Click to collapse
Late to the party. CNexus already has a update cooking.
Sent from my SPH-L710 using Tapatalk
the question im trying to ask is what do we lose if we use the old bootloader? any functionality? (besides the knox security bull$hit)
docnas said:
the question im trying to ask is what do we lose if we use the old bootloader? any functionality? (besides the knox security bull$hit)
Click to expand...
Click to collapse
Right now, wifi is broken with the old bootloader and 4.3 rom...happened on the other devices too (tmo s3 and sprint s4)
But there is a fix: flash at&t kernel. But it messes up screen rotation. So i'm trying to come up with another fix that will let wifi turn on properly and let screen rotation work properly too
You = rock. Or some other awesome thing.
Sent from my SPH-L710 using xda app-developers app
CNexus said:
Right now, wifi is broken with the old bootloader and 4.3 rom...happened on the other devices too (tmo s3 and sprint s4)
But there is a fix: flash at&t kernel. But it messes up screen rotation. So i'm trying to come up with another fix that will let wifi turn on properly and let screen rotation work properly too
Click to expand...
Click to collapse
So is this Knox a Sprint thing, or a Samsung thing?
I can understand the reasoning for Knox(money) but, dang, I guess it's a dog eat dog world out there.
This doesn't affect CyanogenMod does it? I'm scared...
edit... I remember reading about a brick api or command, I never executed it, sounds nasty, is this what they use to brick peoples phones if they try to "hack" it?
Edge-Case said:
So is this Knox a Sprint thing, or a Samsung thing?
I can understand the reasoning for Knox(money) but, dang, I guess it's a dog eat dog world out there.
This doesn't affect CyanogenMod does it? I'm scared...
edit... I remember reading about a brick api or command, I never executed it, sounds nasty, is this what they use to brick peoples phones if they try to "hack" it?
Click to expand...
Click to collapse
This would be a we-can't-update-the-bootloader thing lol. And we can't do that because it has Knox, which is Samsung's doing
This shouldn't affect any AOSP roms because it uses a different kernel and builds its own WiFi libs
docnas said:
the question im trying to ask is what do we lose if we use the old bootloader? any functionality? (besides the knox security bull$hit)
Click to expand...
Click to collapse
From what I've read Knox is Samsung's attempt to provide strong security to their phones for the enterprise customers. As you can imagine, allowing system level access to files can be used to get around a lot of security measures that IT people would like to enforce in their client's devices. It makes sense at the enterprise level, but it's a pain for anyone who want's to mod their phone.
So I think the answer to your question is, unless you are using your phone in a locked down corporate environment then there really is no advantage to Knox. Too bad it can't be turned off, at least not officially.

[Q] just received replacement S4.. questions regarding knox

Phone was lost, just got replacement this morning.
My last S4 had been rooted running custom firmware for months w/o issue.
Read through a bunch of threads, ranging from the opinion that the bootloader change + knox wont be a big issue to the sky is falling.
Is it recommended to root my phone at this time, I do have JUMP and would be replacing it once something better comes out? The phone is running 4.2.2, caught it trying to update to already.
Thanks.. I know this may seem redundant but haven't been active on these boards since I got my CFW going. Not seeking help in flashing or anything.. just advice
skrewler said:
Phone was lost, just got replacement this morning.
My last S4 had been rooted running custom firmware for months w/o issue.
Read through a bunch of threads, ranging from the opinion that the bootloader change + knox wont be a big issue to the sky is falling.
Is it recommended to root my phone at this time, I do have JUMP and would be replacing it once something better comes out? The phone is running 4.2.2, caught it trying to update to already.
Thanks.. I know this may seem redundant but haven't been active on these boards since I got my CFW going. Not seeking help in flashing or anything.. just advice
Click to expand...
Click to collapse
Up to you. If the stock rom is bearable and you wanna run the 4.3 stock rom then by all means, go for it.
skrewler said:
Phone was lost, just got replacement this morning.
My last S4 had been rooted running custom firmware for months w/o issue.
Read through a bunch of threads, ranging from the opinion that the bootloader change + knox wont be a big issue to the sky is falling.
Is it recommended to root my phone at this time, I do have JUMP and would be replacing it once something better comes out? The phone is running 4.2.2, caught it trying to update to already.
Thanks.. I know this may seem redundant but haven't been active on these boards since I got my CFW going. Not seeking help in flashing or anything.. just advice
Click to expand...
Click to collapse
Being that your'e using the T-Mobile M919, the whole KNOX bootloader situation doesn't pertain to you as long as you're sure you're on 4.2.2. Root it, flash it, theme it with Hello Kitty... whatever, it doesn't matter; you can still revert back to stock and reset any tripped counters. 4.3 is when the problems begin and the KNOX counter is implemented and can't be reset.
lordcheeto03 said:
Being that your'e using the T-Mobile M919, the whole KNOX bootloader situation doesn't pertain to you as long as you're sure you're on 4.2.2. Root it, flash it, theme it with Hello Kitty... whatever, it doesn't matter; you can still revert back to stock and reset any tripped counters. 4.3 is when the problems begin and the KNOX counter is implemented and can't be reset.
Click to expand...
Click to collapse
I second this.
SO LONG AS YOU ARE ON 4.2.2
- You can root flash do whatever, theme with hello kitty or barbie xD like lordcheeto said or keep it stock
- Install recovery and flash away.
- Will always be able to revert back to 100 percent stock
TAKE 4.3 UPDATE
- I think you are still able to root it without tripping knox counter. Can't remember the last status of that was. But as long as you root it without a custom recovery, i think you are ok. From what i can remember, the bootloader checks the recovery status and trips the knox counter based off the recovery that is on the device. If its different then stock, it trips. But double check with Google about this first.
- If you trip knox counter, you will NEVER (as of now and possibly forever) get it back to zero.
Rooting with safe root won't trip knox and also disables it. But recoveries, kernels, roms, etc will trip the flag
Sent from my SGH-M919 using Tapatalk
Root it with chain fire and never look back.
You're on 4.22, so you're golden. Just flash a rooted stock ROM that's on 4.3 and you'll avoid Knox.
I'm running 4.4.2 and never seen this Knox stuff.
Sent from my SGH-M919 using XDA Premium 4 mobile app
elesbb said:
- I think you are still able to root it without tripping knox counter. Can't remember the last status of that was. But as long as you root it without a custom recovery, i think you are ok.
Click to expand...
Click to collapse
ShinySide said:
Rooting with safe root won't trip knox and also disables it. But recoveries, kernels, roms, etc will trip the flag
Click to expand...
Click to collapse
Correct. I've rooted my my second GS4G on 4.3 MK2 and it did not trip the KNOX counter. If you're still on 4.2.2 MDL, then there is no need to update your bootloader. Simply flash ROMs through recovery and flash the 4.3 modem. You will have the goodness of 4.3 on KNOX-less 4.2.2 bootloader. :highfive:

Upgrade from 4.1.2 to 4.3?

Hello,
I haven't been here in so long. After reading through the forum I am a little confused.
I am on stock 4.1.2, rooted, and using CW recovery.
I see all the discussion about not updating to 4.3, but I'm not sure if what I have read is up to date or not.
Is there still a problem updating to 4.3? KNOX?
How should I update to 4.3? Do it need to undo root and go back to stock recovery? I'm not sure how to do this. I have used custom ROMS in the past but it's been too long.
Also, it seems that rooting 4.3 is no problem. Is this true?
Thanks,
rblancrt
rblancrt said:
Hello,
I haven't been here in so long. After reading through the forum I am a little confused.
I am on stock 4.1.2, rooted, and using CW recovery.
I see all the discussion about not updating to 4.3, but I'm not sure if what I have read is up to date or not.
Is there still a problem updating to 4.3? KNOX?
How should I update to 4.3? Do it need to undo root and go back to stock recovery? I'm not sure how to do this. I have used custom ROMS in the past but it's been too long.
Also, it seems that rooting 4.3 is no problem. Is this true?
Thanks,
rblancrt
Click to expand...
Click to collapse
Sure, you can upgrade to 4.3 if you want to
the reason why people said not to upgrade to 4.3 is because a lot of people DO NOT READ and come asking for help this or that after they upgrade
and the main reason why people mention not to upgrade is because you can unlock for free as long as you can downgrade your phone to 4.1.1, mainly the bootloader since 4.3 bootloader comes with KNOX
since you're still on 4.1.2, you can downgrade and unlock your phone for free while you still can before upgrading it to 4.3
so this is what you should do, check, if your phone is fully unlocked, if not, unlock it then upgrade
or if you're rich and you don't care, just upgrade and then if you wish to unlock later, pay for unlock code =D
and rooting shouldn't be any problem regardless of which version of android you're on.
to upgrade, you can just download the stock img and flash it through recovery or just use odin flash it
or if you're prefer the old fashion way, the long way in fact, is to unroot, upgrade through system update
I would say don't upgrade. The new bootloader has a warranty bit (aka the Knox counter) that, once tripped, can't be reset. Ever. By anyone. The ONLY way I would even consider upgrading is if you need Knox security for work (the majority of us don't). I wouldn't even upgrade if I were selling the device. Let the new owner make that decision for themself. But, I would unlock it. Even if you never need it, it may add a few bucks to the selling price of the phone later on.
mrhaley30705 said:
I would say don't upgrade. The new bootloader has a warranty bit (aka the Knox counter) that, once tripped, can't be reset. Ever. By anyone. The ONLY way I would even consider upgrading is if you need Knox security for work (the majority of us don't). I wouldn't even upgrade if I were selling the device. Let the new owner make that decision for themself. But, I would unlock it. Even if you never need it, it may add a few bucks to the selling price of the phone later on.
Click to expand...
Click to collapse
But what exactly is the effect of this Knox counter. If it's only that I can't reflash a stock ROM and send it back to Samsung that time has long passed.
I guess I'm getting bored with my phone, had it almost two years, and thought updating to the latest firmware might help.
What are the repercussions of going to 4.3 or higher?
Thanks again for the great info.
If you are out of warranty, the only drawback, imo, to updating is you cannot downgrade the firmware or modem. You could still flash older roms and kernels, just not the full firmware and not the modem.
Personally, I wouldn't let knox deter me from updating, or recommending it. This is for each person to decide, but I feel the benefits outweigh any drawbacks. knox is easily removed or disabled, and I find the latest builds to be some of the best in terms of performance and battery. (of course there are always some who disagree with that on every update!) of course there are no guarantees, but most seem to be quite happy with both 4.3 and 4.4.2.
As for downgrading.....I have never found a real need for doing so. Some have though, so thats something you need to decide for yourself.
You can try some of the available roms w/o updating the firmware btw. But if you decide you like them, I do suggest going back and fully updating for stability and performance, but thats something for you to decide if you want to go that route.
There will be some who agree and some who do not, so in the end its up to you make an educated decision whether or not you want to.

help/info about samsung rooting

hello everyone,
I have and use android phones last 10+ years, always rooted. But I never had samsung phone.
Now I hear only half informations from my buddy, that its dangeous to root samsung because of knox (i dunno what knox even is).
So, now I'm thinking to buy S20 and want to root it, and my question is..:
If I root it, is anything ''broken'' on the phone ? Can phone still recieve official Samsung OTA updates?
What are minuses? what to look for? What about this "knox"?
Please need informaions
Well, I've owned a couple of Samsung devices over the years and I guess I can speak a bit from experience. Here's what you should know:
1.- U.S. phones have their bootloaders locked, so avoid buying a U.S. variant if you want to root it (some people want them for their Snapdragon chips)
2.- Knox is an e-fuse in the phone motherboard. Once you trip it by flashing custom software (root it), then that fuse will be tripped forever. You cannot get your Knox your status back to official unless you change the motherboard. Even flashing stock firmware will never get you this back to official.
3.- A lot of Samsung's security apps check for this fuse and will refuse to work if they detect that you've tripped it. Samsung Pay, Pass, Secure Folder are just some examples of features that will stop working when they detect a tripped Knox fuse. Some of these have bypass with root, but some don't.
4.- You will not get OTA updates with an unlocked bootloader, let alone root. It IS possible to get them back but only after flashing stock firmware and blocking the bootloader. These don't seem to check for Knox.
Understood, Thank You alot for informations and help!
ShaDisNX255 said:
Well, I've owned a couple of Samsung devices over the years and I guess I can speak a bit from experience. Here's what you should know:
1.- U.S. phones have their bootloaders locked, so avoid buying a U.S. variant if you want to root it (some people want them for their Snapdragon chips)
2.- Knox is an e-fuse in the phone motherboard. Once you trip it by flashing custom software (root it), then that fuse will be tripped forever. You cannot get your Knox your status back to official unless you change the motherboard. Even flashing stock firmware will never get you this back to official.
3.- A lot of Samsung's security apps check for this fuse and will refuse to work if they detect that you've tripped it. Samsung Pay, Pass, Secure Folder are just some examples of features that will stop working when they detect a tripped Knox fuse. Some of these have bypass with root, but some don't.
4.- You will not get OTA updates with an unlocked bootloader, let alone root. It IS possible to get them back but only after flashing stock firmware and blocking the bootloader. These don't seem to check for Knox.
Click to expand...
Click to collapse
Hiiii. I currently have a Samsung S20 and I have rooted it before. Once you root it Knox security will be tripped and you will not be able to get it back. This means you will lose access to apps like Samsung Pay, Samsung Pass and Samsung Health. You will not receive OTA updates if you're rooted, but if you flash stock firmware again and lock the bootloader you can start receiving updates again. I currently have a custom ROM installed and I have my ROM rooted. To me, it's been a great experience overall. I didn't really use the Knox features, so I didn't care much about losing it. I have loved rooting my S20 and using a custom ROM !!
victoriam8a said:
Hiiii. I currently have a Samsung S20 and I have rooted it before. Once you root it Knox security will be tripped and you will not be able to get it back. This means you will lose access to apps like Samsung Pay, Samsung Pass and Samsung Health. You will not receive OTA updates if you're rooted, but if you flash stock firmware again and lock the bootloader you can start receiving updates again. I currently have a custom ROM installed and I have my ROM rooted. To me, it's been a great experience overall. I didn't really use the Knox features, so I didn't care much about losing it. I have loved rooting my S20 and using a custom ROM !!
Click to expand...
Click to collapse
Actually you can use Samsung Health, just currently no version above 6.19 (2 versions behind current) until we find a way to patch it...i use it daily with my Watch 4 on Rooted S20+ 5G....
73sydney said:
Actually you can use Samsung Health, just currently no version above 6.19 (2 versions behind current) until we find a way to patch it...i use it daily with my Watch 4 on Rooted S20+ 5G....
Click to expand...
Click to collapse
Ohh okay !!! Thank you for letting us know !! I don't use Samsung Health so I had not tested it myself, but I had heard that Samsung Health doesn't work with root. Thanks for telling us it works fine !!
so, when rooted there are no OTAs.. thats a nono for me heh.. but question, if no OTAs come from mobile itself, is it possible to get uprades through PC then.. (Kies) maybe ?
maxis123 said:
so, when rooted there are no OTAs.. thats a nono for me heh.. but question, if no OTAs come from mobile itself, is it possible to get uprades through PC then.. (Kies) maybe ?
Click to expand...
Click to collapse
Yeah you can flash updates with something like Odin (never used Kies myself, I don't know if it still works)
maxis123 said:
so, when rooted there are no OTAs.. thats a nono for me heh.. but question, if no OTAs come from mobile itself, is it possible to get uprades through PC then.. (Kies) maybe ?
Click to expand...
Click to collapse
ODIN
Flash HOME CSC if you want to keep your data

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