Need explanation of locked bootloader on SM-G890A - Galaxy S6 Active

I've got a S6 Active that when I received it was on Lollipop. I was able to flash MM (using thread here on XDA) to it before it was officially released from the carrier. Then I was able to flash back to stock Lollipop and then received the MM 6.0.1 update from the carrier. I wanted to flash back to Lollipop for testing purposes but was unable. I think it's because the bootloader is locked?
I've read a bunch of threads saying that the S6 active has nott been rooted? Has a locked bootloader? Can't run custom roms?
Can someone please give me the scoop on this. I'd like to go back to lollipop for testing but I don't think its possible. Is that the case? Thanks.
Roveer

roveer said:
I've got a S6 Active that when I received it was on Lollipop. I was able to flash MM (using thread here on XDA) to it before it was officially released from the carrier. Then I was able to flash back to stock Lollipop and then received the MM 6.0.1 update from the carrier. I wanted to flash back to Lollipop for testing purposes but was unable. I think it's because the bootloader is locked?
I've read a bunch of threads saying that the S6 active has nott been rooted? Has a locked bootloader? Can't run custom roms?
Can someone please give me the scoop on this. I'd like to go back to lollipop for testing but I don't think its possible. Is that the case? Thanks.
Roveer
Click to expand...
Click to collapse
hi
yes it's not possible to downgrade your rom or your bootloader because of the locked bootloader that prevents any try to modify the device...

is this typical of most phones? I've read of others frutrations about the S6 active still having a locked bootloader. Did I just pick a bad platform? Is S6 the same way? How about S7 series? Thanks.

roveer said:
is this typical of most phones? I've read of others frutrations about the S6 active still having a locked bootloader. Did I just pick a bad platform? Is S6 the same way? How about S7 series? Thanks.
Click to expand...
Click to collapse
Locked bootloaders are often the case for phones provided by carriers. While a phone purchased directly from the manufacturer is usually able to have its bootloader unlocked, carrier phones are locked by the carrier themselves, preventing any tampering by the end user. A custom ROM is any modified version of Android not developed by the company that made your phone. Think of it like a third party system. To get these custom ROMs onto your phone you must "flash" (simply, install) the ROM from your computer to your phone. However, a locked bootloader prevents this. While in some cases there are ways to get around carrier locked bootloaders, it is generally futile. If you purchased the S6 Active in hopes of tinkering around with custom ROMs, I'm afraid you have picked the wrong phone. The S6 Active, as of currently, is permanently locked to Samsung's and AT&T's "stock ROM"
EDIT: as for going back to Lollipop, the reason this is generally not possible is due to the fact that the Marshmallow update also updated critical parts related to the bootloader. It is impossible to roll back these changes once they have been made as they are strictly one way.

Thanks for the explanation. I didn't buy the phone for the express reason for changing android versions but rather to use as my daily driver. We are a BES 12 (Blackberry Enterprise Server) shop and I have found a bug that causes the VPN portion of the software to drop after an hour or so. Simply hitting the home button (waking the phone up re-establishes the vpn and mail flow continues). I'm working with BB to determine what's going on. I've disabled all power saving and doze settings yet still the problem. They are going to activate some other phones on my system to see if they see the problem. My reason for wanting to go back to lollipop is that I don't believe I saw this problem when I was on that OS so I was hoping to go back to confirm that behavior. I like the "active" phones for their ruggedness but don't have an unlimited budget to be buying handsets.
Roveer

roveer said:
Thanks for the explanation. I didn't buy the phone for the express reason for changing android versions but rather to use as my daily driver. We are a BES 12 (Blackberry Enterprise Server) shop and I have found a bug that causes the VPN portion of the software to drop after an hour or so. Simply hitting the home button (waking the phone up re-establishes the vpn and mail flow continues). I'm working with BB to determine what's going on. I've disabled all power saving and doze settings yet still the problem. They are going to activate some other phones on my system to see if they see the problem. My reason for wanting to go back to lollipop is that I don't believe I saw this problem when I was on that OS so I was hoping to go back to confirm that behavior. I like the "active" phones for their ruggedness but don't have an unlimited budget to be buying handsets.
Roveer
Click to expand...
Click to collapse
If the software you are referring to is something provided by blackberry, perhaps they need to patch their software for compatibility with Android Marshmallow. While not all software is broken by a major Android update, there are definitely some that are. Of course enterprise level software is entirely foreign to me (I'm only 17), so getting a second opinion on this issue would definitely be a good idea.

OK, I understand locked bootloader preventing from flashing any custom roms etc. Even preventing previous official android. Here's another question: Is there a way to flash current android version? I'm on G890AUCS4CPF3 which is an AT&T build. What is the carrier's method to reflash current OS when there has been some corruption to the version that is on the phone. Not just wipe, but reload entire android, re-create file system etc... That's what I want to try next. Blackberry has activated a Samsung S6 on my server and it (so far) is not exhibiting the same problem as my S6 Active. This leads me to believe that it my be a problem with my hardware. I want to do a reload at this point. Any ideas how I can do that? Odin flash? Is there a repository for the G890AUCS4CPF3 ROM?
Thanks,
Roveer

roveer said:
OK, I understand locked bootloader preventing from flashing any custom roms etc. Even preventing previous official android. Here's another question: Is there a way to flash current android version? I'm on G890AUCS4CPF3 which is an AT&T build. What is the carrier's method to reflash current OS when there has been some corruption to the version that is on the phone. Not just wipe, but reload entire android, re-create file system etc... That's what I want to try next. Blackberry has activated a Samsung S6 on my server and it (so far) is not exhibiting the same problem as my S6 Active. This leads me to believe that it my be a problem with my hardware. I want to do a reload at this point. Any ideas how I can do that? Odin flash? Is there a repository for the G890AUCS4CPF3 ROM?
Thanks,
Roveer
Click to expand...
Click to collapse
Carriers can tell if your Firmware is theirs or not because official Firmware is digitally signed by Samsung and AT&T.
As for using Odin, that would be your most viable option. However, I am not aware of any Odin images for the Marshmallow update on the S6A. As far as I know, Odin cannot get around the restriction of having a newer Bootloader, so you cannot flash down.
One thing you can try is to wipe cache partition. If that fails, factory reset from within the bootloader. Just make sure you've backed your data up.
EDIT: Take note that there is a difference in Firmware between the S6 vs the S6A.
EDIT 2: In your other thread you stated you can't flash back to lollipop due to a locked bootloader. This is actually due to, as stated before, the newest bootloader tha to the latest Android Marshmallow update.

FevenKitsune said:
Carriers can tell if your Firmware is theirs or not because official Firmware is digitally signed by Samsung and AT&T.
As for using Odin, that would be your most viable option. However, I am not aware of any Odin images for the Marshmallow update on the S6A. As far as I know, Odin cannot get around the restriction of having a newer Bootloader, so you cannot flash down.
One thing you can try is to wipe cache partition. If that fails, factory reset from within the bootloader. Just make sure you've backed your data up.
EDIT: Take note that there is a difference in Firmware between the S6 vs the S6A.
EDIT 2: In your other thread you stated you can't flash back to lollipop due to a locked bootloader. This is actually due to, as stated before, the newest bootloader tha to the latest Android Marshmallow update.
Click to expand...
Click to collapse
So I wiped the cache partition and factory reset within the bootloader and tried my app again. It continued to fail. I even found the MM image in the S6 Active MM thread and sideloaded it. It was only 400+ megs though. Still the app doesn't work so I'm starting to doubt that my problems are related to my particular S6 but its always a possibility. I'm trying to get Blackberry to dig up their own S6A and test on their own. They've been testing with a S6 for the past 2 days (on my BES server) and haven't seen the same problems, so it's either my device or a problem with the S6A (which as has been pointed out does use a different firmware version than the S6), but until I can get another S6 Active device to test I won't know.
Roveer

Related

[Q] New Google Nexus 6 - upgrade to 5.1.1

Since I first started down this Android path I've always brought my phones direct from big red which, for all the problems it created it did make life simple when it came to identify which ROM to download etc.
This week I broke tradition and dropped some money on Google's lap and picked up a Nexus 6 direct from them - no more locked down to VZW for me if I so choose.
Previously I had a Incredible, then a GS III then finally a M8 - all three rooted and unlocked\S-OFF'd so this isn't my first rodeo.
That said I'm also wanting to tread VERY VERY lightly here because time and time again I read the the biggest reason folk get bricks is because they assumed and didn't ask questions before they flashed.
So, all this aside, here I am with my now Unlocked 5.0 Non branded Nexus 6 with LNX07M with TWRP 2.8 latest as a custom recovery and, as of right now, no root (to help ease any upgrade).
I've found various Stock ROMS out there there would indicate I'd need to be however on 5.0.1 before I could sideload a 5.1.1. Is this true? If so, do I need to blow away TWRP before I do this because when I tried previously to take the update it dropped me into TWRP.
Is there any way I can avoid all this, wipe and flash a Stock 5.1.1 direct? Wiping the phone isn't an issue as there's nowt on it right now. And should I root now, while still on 5.0 or wait until 5.1.1 (because it'll require a factory reset). Would root even survive a 5.1.1 upgrade?
I'm nervous here because I keep seeing lines such as 'T-MOBILE only' and different code letters after the build name seemingly signifying the different vendors. Given that I got mine direct from Google though I'm unsure how I should proceed because I really don't want to be left with an unhappy 6 so soon after delivery.
Thanks in advance!
R
Rachel Ambler said:
Since I first started down this Android path I've always brought my phones direct from big red which, for all the problems it created it did make life simple when it came to identify which ROM to download etc.
This week I broke tradition and dropped some money on Google's lap and picked up a Nexus 6 direct from them - no more locked down to VZW for me if I so choose.
Previously I had a Incredible, then a GS III then finally a M8 - all three rooted and unlocked\S-OFF'd so this isn't my first rodeo.
That said I'm also wanting to tread VERY VERY lightly here because time and time again I read the the biggest reason folk get bricks is because they assumed and didn't ask questions before they flashed.
So, all this aside, here I am with my now Unlocked 5.0 Non branded Nexus 6 with LNX07M with TWRP 2.8 latest as a custom recovery and, as of right now, no root (to help ease any upgrade).
I've found various Stock ROMS out there there would indicate I'd need to be however on 5.0.1 before I could sideload a 5.1.1. Is this true? If so, do I need to blow away TWRP before I do this because when I tried previously to take the update it dropped me into TWRP.
Is there any way I can avoid all this, wipe and flash a Stock 5.1.1 direct? Wiping the phone isn't an issue as there's nowt on it right now. And should I root now, while still on 5.0 or wait until 5.1.1 (because it'll require a factory reset). Would root even survive a 5.1.1 upgrade?
I'm nervous here because I keep seeing lines such as 'T-MOBILE only' and different code letters after the build name seemingly signifying the different vendors. Given that I got mine direct from Google though I'm unsure how I should proceed because I really don't want to be left with an unhappy 6 so soon after delivery.
Thanks in advance!
R
Click to expand...
Click to collapse
The main reason that some users bricked their phone is that they wiped the OS and had a locked bootloader which leaves no possibility ro recover the phone
What carrier do you use?
T-Mobile would be the LYZ28E rom and ATT/USC/International devices would be LMY47Z and Verizon is LMY47E.
Look here http://forum.xda-developers.com/nexus-6/general/ref-nexus-6-stock-ota-urls-t2906493 and here http://forum.xda-developers.com/nexus-6/general/guide-flash-factory-images-nexus-6shamu-t2954008.
Unless something is special about the N6 that I'm not aware of, the OS you update FROM only matters if you're sideloading an OTA file. Flashing factory images, you could be coming from a custom ROM(I just took my old N4 from CM12.1 to stock 4.4 on Sunday).
The current build for VZW is 5.1 LMY47E. I think they are updating to 5.1.1 now(LMY47Z, which seems to be universal now except for maybe T-Mo). I flashed mine from E to Z on Saturday because I bought mine unlocked but it had the VZW build, and I'm on an AT&T MVNO.
gee2012 said:
What carrier do you use?
T-Mobile would be the LYZ28E rom and ATT/USC/International devices would be LMY47Z and Verizon is LMY47E.
Look here http://forum.xda-developers.com/nexus-6/general/ref-nexus-6-stock-ota-urls-t2906493 and here http://forum.xda-developers.com/nexus-6/general/guide-flash-factory-images-nexus-6shamu-t2954008.
Click to expand...
Click to collapse
Still with VZW for now, but, as I said, I didn't purchase the phone from them, I brought it from Google direct so it's carrier agnostic (well, in the US at least!) hence my confusion. The last thing I want to do is flash a ROM that's carrier specific but I don't know which one to take with this being the case.
As for the order, my M8 needed to go in two stages to jump from my old Venom build due to changes with the radio (I think) - hence my question there.
If you root, you'll.never get an OTA anyway, sonit doesn't matter which rom you flash aa you can flash any other rom.over it
None of the carrier specific roms will restrict anything, or add branding, so go for whichever.
Rachel Ambler said:
Still with VZW for now, but, as I said, I didn't purchase the phone from them, I brought it from Google direct so it's carrier agnostic (well, in the US at least!) hence my confusion. The last thing I want to do is flash a ROM that's carrier specific but I don't know which one to take with this being the case.
As for the order, my M8 needed to go in two stages to jump from my old Venom build due to changes with the radio (I think) - hence my question there.
Click to expand...
Click to collapse
Just flash the LMY47E rom and when its available you get the OTA to update or sideload the OTA from here http://forum.xda-developers.com/nexus-6/general/ref-nexus-6-stock-ota-urls-t2906493 when its available.
danarama said:
None of the carrier specific roms will restrict anything, or add branding, so go for whichever.
Click to expand...
Click to collapse
Really? Is there a reason why they exist then? Usually my understanding was that they contained carrier specific items including radios and bloatware.
Rachel Ambler said:
Really? Is there a reason why they exist then? Usually my understanding was that they contained carrier specific items including radios and bloatware.
Click to expand...
Click to collapse
There's no bloatware on these roms.
Verizon rom includes binaries that make VoLTE work properly on their network where as T-mobile adds a kernel fix to allow their wifi calling to work. And that's it...
gee2012 said:
Just flash the LMY47E rom and when its available you get the OTA to update or sideload the OTA from here http://forum.xda-developers.com/nexus-6/general/ref-nexus-6-stock-ota-urls-t2906493 when its available.
Click to expand...
Click to collapse
So what would be the benefit of flashing a Verizon ROM is, for example I should suddenly decide to go to T-Mobile next week given that I didn't purchase the phone from them?
Sorry if these are noob questions but this whole carrier agnostic\yet not agnostic thing has me really wanting to make sure my phone stays as agnostic as it was when it left the factory, bar a VZW Sim nestled inside and a VZW APN entry.
danarama said:
There's no bloatware on these roms.
Verizon rom includes binaries that make VoLTE work properly on their network where as T-mobile addsna kernel fix to allow their wifi calling to work. And that's it...
Click to expand...
Click to collapse
Interesting. So this would leave me to believe then that, should I decide one day to jump carriers, I'd be better off flashing a ROM for that carrier at the appropriate time?
This being the case, why would the phone come with no carrier specific software on board from Google? Wouldn't this mean I might get a degraded service?
Rachel Ambler said:
So what would be the benefit of flashing a Verizon ROM is, for example I should suddenly decide to go to T-Mobile next week given that I didn't purchase the phone from them?
Sorry if these are noob questions but this whole carrier agnostic\yet not agnostic thing has me really wanting to make sure my phone stays as agnostic as it was when it left the factory, bar a VZW Sim nestled inside and a VZW APN entry.
Click to expand...
Click to collapse
If you want to use T-Mobile in the future you just flash the LYZ28E rom.
Rachel Ambler said:
So what would be the benefit of flashing a Verizon ROM is, for example I should suddenly decide to go to T-Mobile next week given that I didn't purchase the phone from them?
Sorry if these are noob questions but this whole carrier agnostic\yet not agnostic thing has me really wanting to make sure my phone stays as agnostic as it was when it left the factory, bar a VZW Sim nestled inside and a VZW APN entry.
Click to expand...
Click to collapse
Well all Nexus 6 used to get the same updates but tmob and red, wanted approval on theirs - and now we know why.
Since google are still sending these updates and they update onto generic builds, they can only use your sim card as the identifier.
If you leave root out of it, the only way you can avoid the vzw update is to manually update to something else (something vzw updates won't work on). Each OTA looks for a specific build to flash on and won't flash on anything else.
If you do accept the vzw update, you'll never get away from them unless you manually flash a full factory rom.
Bringing root back into it, OTA will never flash anyway, so you'll have to either manually flash factory or flash rom.zips in TWRP
gee2012 said:
If you want to use T-Mobile in the future you just flash the LYZ28E rom.
Click to expand...
Click to collapse
This is already explaining a lot! So, given that, as I said, I'm not bog standard non-carrier specific 5.0 (and I've yet to even migrate my SIM over) the suggested action would be to download LMY47E 5.1 (as 5.1.1 is not yet out for VZW as they ALWAYS seem to be last to the party) and flash it via TWRP? And I can do that over my LNX07M build?
danarama said:
"Well all Nexus 6 used to get the same updates but tmob and red, ..."
Click to expand...
Click to collapse
Great info, very useful.
Rachel Ambler said:
Interesting. So this would leave me to believe then that, should I decide one day to jump carriers, I'd be better off flashing a ROM for that carrier at the appropriate time?
This being the case, why would the phone come with no carrier specific software on board from Google? Wouldn't this mean I might get a degraded service?
Click to expand...
Click to collapse
There were no carrier specific ROMs when Nexus 6 came out. Using any rom on any Nexus and they will all act the same, except you wont get improved volte or wifi calling on those carriers. Their changes will not prove detrimental on other carriers
danarama said:
Well all Nexus 6 used to get the same updates but tmob and red, wanted approval on theirs - and now we know why.
Since google are still sending these updates and they update onto generic builds, they can only use your sim card as the identifier.
If you leave root out of it, the only way you can avoid the vzw update is to manually update to something else (something vzw updates won't work on). Each OTA looks for a specific build to flash on and won't flash on anything else.
If you do accept the vzw update, you'll never get away from them unless you manually flash a full factory rom.
Bringing root back into it, OTA will never flash anyway, so you'll have to either manually flash factory or flash rom.zips in TWRP
Click to expand...
Click to collapse
Now the murky seas are de-murkyfing!
So go for the VZW build for now with the knowledge and understanding that if I ever decide to bid them a less than fond adieu, I'd be best at that point flash a factory image OR flash another carrier specific ROM once I've chosen the new carrier?
And should I root now, or post the 5.1 flash? I'm guessing post because I'd assuming flashing 5.1 would blow my root away.
I assume I can flash post VZW 5.1 because the boatloader is still all mine and the flash doesn't effect that. Right?
Rachel Ambler said:
This is already explaining a lot! So, given that, as I said, I'm not bog standard non-carrier specific 5.0 (and I've yet to even migrate my SIM over) the suggested action would be to download LMY47E 5.1 (as 5.1.1 is not yet out for VZW as they ALWAYS seem to be last to the party) and flash it via TWRP? And I can do that over my LNX07M build?
Click to expand...
Click to collapse
Depends how you do it.
Google factory images are flashed from a computer using fastboot.
You may be able to find a rom.zip of that version on xda that can be flashed via TWRP.
As long as you aren't flashing an incremental OTA, you can flash over anything. OTA actually patch files not replace them, so they can only be flashed on the rom they are intended for.
Rachel Ambler said:
Now the murky seas are de-murkyfing!
So go for the VZW build for now with the knowledge and understanding that if I ever decide to bid them a less than fond adieu, I'd be best at that point flash a factory image OR flash another carrier specific ROM once I've chosen the new carrier?
And should I root now, or post the 5.1 flash? I'm guessing post because I'd assuming flashing 5.1 would blow my root away.
I assume I can flash post VZW 5.1 because the boatloader is still all mine and the flash doesn't effect that. Right?
Click to expand...
Click to collapse
Why not go with a custom rom like chroma? Get 5.1.1 now and personally it works really well.
danarama said:
Depends how you do it.
Google factory images are flashed from a computer using fastboot.
You may be able to find a rom.zip of that version on sea that can be flashed via TWRP.
As long as you aren't flashing an incremental OTA, you can flash over anything. OTA actually patch files not replace them, so they can only be flashed on the rom they are intended for.
Click to expand...
Click to collapse
I'm sorry if that sudden flash of the light coming on in my head just blinded you, but that's what happens when things start to make sense!
OK, so, this all being the case, and that the OTA's are incremental, then in order to go 5.1 with the build from http://forum.xda-developers.com/nexus-6/general/ref-nexus-6-stock-ota-urls-t2906493 then I WOULD need 5.0.1? Would that work though if I'm on a generic build since, if it's expecting to patch existing VZW files, wouldn't it fail because they're not there? Failing that I'd need to find a flashable 5.1 for VZW (if one even exists)?
endlessryan said:
Why not go with a custom rom like chroma? Get 5.1.1 now and personally it works really well.
Click to expand...
Click to collapse
But it wouldn't have the VoLTE improvements, etc, right? Besides, right now I'd like to stay as stock as possible as it's not just my phone I'm working on, both myself and my wife got one at the same time and I know she will most definitely NOT want anything other than stock.

Possible ways to achieve root?

So I actually don't have the S5, or any Samsung device for that matter, but a friend of mine does, and really wants to root their phone. I had no idea the AT&T S5 was so secure, but it's pretty interesting too. I've been researching for over 15 hours. I may not have been able to root his phone, but I think I have learned a couple things and maybe some possible root methods.
1.) Since using ODIN to downgrade would soft brick the phone, would it be possible to download the stock Lollipop update onto a computer, give the update super user access, replace the recovery with a custom one, or unlock the bootloader from the computer, then flash it through ODIN?
2.) Intercept any sort of OTA update, then alter it to flash a custom recovery or unlock bootloader? I don't know how you would go around this though.
3.) If someone hasn't taken the OTA update that patched the Stagefright exploit, could someone purposely use the exploit to allow installation of a custom recovery or even to unlock the bootloader since the Stagefright bug has super user access (or so I've heard).
Also, I'm sorry if these are stupid ideas. I know close to nothing about Samsung so everything I'm basing this off of is what I've read in the past 15 hours.
jsmithfms said:
So I actually don't have the S5, or any Samsung device for that matter, but a friend of mine does, and really wants to root their phone. I had no idea the AT&T S5 was so secure, but it's pretty interesting too. I've been researching for over 15 hours. I may not have been able to root his phone, but I think I have learned a couple things and maybe some possible root methods.
1.) Since using ODIN to downgrade would soft brick the phone, would it be possible to download the stock Lollipop update onto a computer, give the update super user access, replace the recovery with a custom one, or unlock the bootloader from the computer, then flash it through ODIN?
2.) Intercept any sort of OTA update, then alter it to flash a custom recovery or unlock bootloader? I don't know how you would go around this though.
3.) If someone hasn't taken the OTA update that patched the Stagefright exploit, could someone purposely use the exploit to allow installation of a custom recovery or even to unlock the bootloader since the Stagefright bug has super user access (or so I've heard).
Also, I'm sorry if these are stupid ideas. I know close to nothing about Samsung so everything I'm basing this off of is what I've read in the past 15 hours.
Click to expand...
Click to collapse
The issue is that AT&T (and Verizon) use an encrypted signature key to verify they are the correct unaltered files as well as the means to unlock the bootloader to allow the OTA. Without that key, the tasks you mention are near impossible. They are not stupid ideas at all..just very difficult with all the security checks included.
KennyG123 said:
The issue is that AT&T (and Verizon) use an encrypted signature key to verify they are the correct unaltered files as well as the means to unlock the bootloader to allow the OTA. Without that key, the tasks you mention are near impossible. They are not stupid ideas at all..just very difficult with all the security checks included.
Click to expand...
Click to collapse
Crap... well does anyone know how that encyption key is generated? Like, could I theoretically get an algorithm from a ROM?
Honestly for the time being I wouldn't bother with ROMS for that Device and carrier at the moment. Especially being that its someone elses device. Towelroot should be a good start. If Im not mistaken I don't think its supposed to trip knox.
Sent from my HTCEVODesign4G using XDA Free mobile app
jsmithfms said:
Crap... well does anyone know how that encyption key is generated? Like, could I theoretically get an algorithm from a ROM?
Click to expand...
Click to collapse
This is the riddle of the Sphinx my friend. I am sure the super devs have tried their best so far to crack it. It has been an ongoing effort to make phones more and more secure, not against the amateur developers and rooters, but against the hackers. These smartphones are now our personal computers, diaries, personal assistants, financial operator, and more. They basically are a person's (and business's) life. AT&T and Verizon have taken the big steps to appeal to the Exchange clients, corporate, government and military contracts. Even the general public want to know their phone is secure. This is what keeps me stuck on the Sprint network.
Have you tried Kingroot?
I successfully rooted my wife's AT&T S4 on OC3 lollipop (supposedly unrootable) with the desktop version. Mobile version didn't work but desktop did without a hiccup. Maybe it'll work on the S5.
http://forum.xda-developers.com/android/apps-games/one-click-root-tool-android-2-x-5-0-t3107461
Rockin' a l337 with Goldeneye v49.1 + Wanam Xposed and loving life on AT&T's 4G LTE network
S5 on lollipop has a new nasty boot loader.... it was a miracle on its own that they ever came up with safestrap to duck the boot loader on earlier versions of android

Lollipop 5.1.1 on T715?

OK I'm a complete newbie here. I bought the 8" S2 International unlocked version from Amazon and will take it to AT&T to activate it tomorrow. It's on 5.0.2 and is not seeing any OTA updates. Does anyone know if there's a way to get 5.1.1 OTA? If not, does anyone know if Samsung has commented as to whether they'll release 5.1.1, or even Marshmallow, for this device or will I have to go to a custom ROM?
Also, is there an absolute beginners guide to this site? I've been reading through the threads and keep seeing terms like odin, twrp, and many others that I don't know what they mean and I'd like to figure out.
Thanks.
CincyTriGuy said:
OK I'm a complete newbie here. I bought the 8" S2 International unlocked version from Amazon and will take it to AT&T to activate it tomorrow. It's on 5.0.2 and is not seeing any OTA updates. Does anyone know if there's a way to get 5.1.1 OTA? If not, does anyone know if Samsung has commented as to whether they'll release 5.1.1, or even Marshmallow, for this device or will I have to go to a custom ROM?
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Click to collapse
i just received the same device yesterday and so far, it's working just fine on at&t: including data full phone features (i wasn't aware that this version of the Tab S2 had a full fledged phone). i inserted my nano sim from my dual-sim note5 and the S2 configured everything automatically. also, i didn't see an OTA when i checked yesterday and there's nothing at sammobile.com which is where one can generally find firmware (stock ROM) for Samsung devices. any custom ROM right now will likely be 5.0.2.
CincyTriGuy said:
Also, is there an absolute beginners guide to this site? I've been reading through the threads and keep seeing terms like odin, twrp, and many others that I don't know what they mean and I'd like to figure out..
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Odin = Windows based application used to flash firmware to Samsung devices.
TWRP = a custom recovery that - once your phone is rooted (similar to admin privileges on windows pc) - allows one to flash a custom ROM or other components/features not on a stock device. you can also create backups/nandroids of your device so you can restore your device if something goes wrong (similar to resorting a windows system image to a new hard drive). always, always backup when trying things out. tutorials are here, but sometimes not easily located via search. :good:

Need help with flashing firmware on Note 9 (noob question)

I have Note 9 (SM-N960U1) unlocked in USA. I am currently on AT&T.
I seem to have many dead spots inside my house so want to enable wifi calling but found out that I need to flash carrier specific firmware on my phone. As I am complete noob, have some questions:
1) What does flashing a firmware does? Pros? Cons?
2) I am currently on Android 10 (One UI 2.0 Build QP1A.190711.020.N960U1UEU3ZSL2). If I flash a new firmware, will my phone be downgraded to a lower version of Android?
3) If answer to @2 is Yes, how will I get latest Android updates? Will it depend on Samsung or AT&T?
4) Last but not the least, HOW THE HELL I FLASH THIS FIRMWARE?
Any help will be a great help. I have a interview on Friday so don't have much time to get this fixed.
TIA.
1) Flashing is a way to manually install or update firmware or operating system through the bootloader. This provides a way to restore the devices operating system during an emergency or failed OTA Update etc. The cons of this however is it is quite easy to mess up your device if you don't know what you are doing. And Flashing different firmware that is not originally meant for your device easily carries this risk. The bootloader is what tells your device how to boot the operating system and happens before any user interaction knock on wood you theoretically corrupt the bootloader or somehow mess it up you are left with a 1000 dollar doorstop. Im not sure how a carrier's firmware would react on an unlocked phone. I personally wouldn't risk it but it's up to you. I'm pretty sure that other users here have tried it you should look around and do your research. Remember this would not only be changing Android this would also change the CSC and Modem.
2) Android 10 has not yet been released for the Note 9 so I would assume that you are on the beta. You would need to factory reset and downgrade to Android 9 before flashing ATT's firmware.
3) Carrier's handle OTA updates. However im not sure you would even receive OTA's anymore.
4) You need to use Odin3 and get the firmware from somewhere like sammobile.
In conclusion I personally would advise you to contact ATT with your problem. Considering your interview tomorrow if something did for some reason go wrong you most likely wouldn't have time to fix it.
UndeadAnarchy said:
1) Flashing is a way to manually install or update firmware or operating system through the bootloader. This provides a way to restore the devices operating system during an emergency or failed OTA Update etc. The cons of this however is it is quite easy to mess up your device if you don't know what you are doing. And Flashing different firmware that is not originally meant for your device easily carries this risk. The bootloader is what tells your device how to boot the operating system and happens before any user interaction knock on wood you theoretically corrupt the bootloader or somehow mess it up you are left with a 1000 dollar doorstop. Im not sure how a carrier's firmware would react on an unlocked phone. I personally wouldn't risk it but it's up to you. I'm pretty sure that other users here have tried it you should look around and do your research. Remember this would not only be changing Android this would also change the CSC and Modem.
2) Android 10 has not yet been released for the Note 9 so I would assume that you are on the beta. You would need to factory reset and downgrade to Android 9 before flashing ATT's firmware.
3) Carrier's handle OTA updates. However im not sure you would even receive OTA's anymore.
4) You need to use Odin3 and get the firmware from somewhere like sammobile.
In conclusion I personally would advise you to contact ATT with your problem. Considering your interview tomorrow if something did for some reason go wrong you most likely wouldn't have time to fix it.
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Thanks a lot for your help mate..cheers
rockstar283 said:
I have Note 9 (SM-N960U1) unlocked in USA. I am currently on AT&T.
I seem to have many dead spots inside my house so want to enable wifi calling but found out that I need to flash carrier specific firmware on my phone. As I am complete noob, have some questions:
1) What does flashing a firmware does? Pros? Cons?
2) I am currently on Android 10 (One UI 2.0 Build QP1A.190711.020.N960U1UEU3ZSL2). If I flash a new firmware, will my phone be downgraded to a lower version of Android?
3) If answer to @2 is Yes, how will I get latest Android updates? Will it depend on Samsung or AT&T?
4) Last but not the least, HOW THE HELL I FLASH THIS FIRMWARE?
Any help will be a great help. I have a interview on Friday so don't have much time to get this fixed.
TIA.
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Click to collapse
You have SM-N960U1 with One UI 2.0? Did you just buy it used? You are on bootloader 3, so you cannot flash another firmware with bootloader less than 3.

Downgrade from 13 to 12?

Is it possible to downgrade from 13 to 12? I think the upgrade messed up my camera. Or maybe a way to reflash the camera firmware?
If the bootloader wasn't updated you can roll it back.
How can I find out if it was updated? I have a US unlocked phone. Its updated from 11 to 12 and now to 13.
See this thread, different models but the same information applies.
blackhawk said:
See this thread, different models but the same information applies.
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This is the build I'm on now:
RedCrane3 said:
This is the build I'm on now:
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Hello good morning
Of course, it can be downgraded, as long as the binary number is the same... example in the image.
The bootloader version is 9 so for you to roll back that build number's 5th digit from the end needs to be the same or higher.
With stock Snapdragon's locked bootloader it's easy to get locked into an OTA upgrade you don't want if it updates the bootloader too. I have two N10+'s, one running on 9, the other 10 (can't be rolled back to 9). That's what they were loaded when bought new. They will likely remain on those versions for their service lives as they are running well. I prefer Pie though.
I could be running Android 11 or 12 but I blew them off mostly because of the scoped storage bs.
The first thing I disable is OTA updates, once bitten twice shy. Had a S4+ that got screwed up by a OTA update that couldn't be rolled back... it sucks.
Thank you guys for helping me with all of this information. I guess I have a decision to make.
I can try to rollback to Android 12 in the hopes that will fix my camera issue, or I can sit tight and hope that a future update will resolve it.
Either way, I'm beginning to regret allowing OTA updates.
I really love the hardware of this phone, especially the screen, but its not important to me to have the latest Android (security updates are important though).
I originnaly submitted the problem to Samsung through their members app and the tech who looked at it said he *thought* it was a hardware issue, but come on, what are the chances that the one camera stops working right after the update to 13 and OneUI 5? I take very good care of my phone and never drop it (certainly didn't recently, after the update), there's not a scratch on it.
I suppose its possible, but it would be an incredible coincidence...
The tech suggested I visit a service center (which for me would be a Best Buy, yikes) or call their support 800 number, but what are they going to be able to do that the tech couldn't?
I just don't know if I can trust their initial assessment - no one knows everything, and plenty of people give up on a problem and pass it off the first trouble they run into. Maybe the tech just wasn't interested in digging deeper? A quote from their answer:
"Chi request is getting timed out. Read wide camera sensor seems to be not responding to requests [...]"
I guess my question is: can a downgrade to 12 even fix the issue?
Should I wait for another update?
Or should i just heave Samsung over the side and try to install a custom ROM?
Thanks again for all your help.
You're welcome.
If the bootloader is locked you can't install a custom rom. This is the case with most newer Snapdragon's including the N10+.
The Samsung Experience center at the best buys can run advanced diagnostics so they might be able to find the issue. They can also roll it back or try a reflash of 13.
blackhawk said:
You're welcome.
If the bootloader is locked you can't install a custom rom. This is the case with most newer Snapdragon's including the N10+.
The Samsung Experience center at the best buys can run advanced diagnostics so they might be able to find the issue. They can also roll it back or try a reflash of 13.
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Ah, ok, but do you mean that the version I have (unlocked US snapdragon) is not able to unlock the bootloader, or just that I'd need to do that first? I do have experience with custom ROMS; my old moto X4 has seen many different ROMS in it's lifetime, so I do feel comfortable unlocking the bootloader and flashing other ROMS.
RedCrane3 said:
Ah, ok, but do you mean that the version I have (unlocked US snapdragon) is not able to unlock the bootloader, or just that I'd need to do that first? I do have experience with custom ROMS; my old moto X4 has seen many different ROMS in it's lifetime, so I do feel comfortable unlocking the bootloader and flashing other ROMS.
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That refers to the carrier not bootloader I think. Not sure about your specific model's bootloader.

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