[Q] Unlock Bootloader - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

I have a galaxy s4 att with nj4. Is there any way to unlock the bootloader and install lollipop? If not then why do developers develop lollipop if no one can flash them?

Corbin270 said:
I have a galaxy s4 att with nj4. Is there any way to unlock the bootloader and install lollipop? If not then why do developers develop lollipop if no one can flash them?
Click to expand...
Click to collapse
Amen. Then they will not tell you on their page where you download it, that it will not work with Locked Bootloader!!

not everyone has a locked bootloader.

iateshaggy said:
not everyone has a locked bootloader.
Click to expand...
Click to collapse
Every i337 has a locked bootloader. There are just some who can exploit it with Loki
Sent from my Nexus 9 using XDA Free mobile app

jd1639 said:
Every i337 has a locked bootloader. There are just some who can exploit it with Loki
Sent from my Nexus 9 using XDA Free mobile app
Click to expand...
Click to collapse
So you are saying No way to install Lollipop until OTA of it comes out???

tailgunner9 said:
So you are saying No way to install Lollipop until OTA of it comes out???
Click to expand...
Click to collapse
I once had a unlocked bootloader but was forced into upgrade to NJ4 and sorry to say there is no escape from the locked bootloader. I'm now running a updated version of SafeStrap 3.82 and there are a few that are working to get lollipop running for our device. However the talk is a kernel problem and that may take awhile.
I just wish they would kick out a official lollipop update. I've been on T-Mobile for over 10 years and ended up with this device because I won it. Wish I could afford to get rid of it and move to a T-Mobile device period.

tailgunner9 said:
So you are saying No way to install Lollipop until OTA of it comes out???
Click to expand...
Click to collapse
Nope. You can blame AT&T for that (since they requested the locked bootloader for their version of the device). I got lucky with mine; when I got it, they said they would update it there in the store, but I told them to hold off because I could do it myself. That was the only thing that allowed me to custom firmware on my phone - that update they wanted to flash was MF3.

Related

[Q] Rooting 4.3 - MVLUEMK6

Hey fellow XDA members, I have been searching for a way to
root and install a custom recovery on my I337M, but am slightly
confused about this phone, and I don't wanna screw it up.
First off I am on 4.3 - MVLUEMK6. I also have the Knox app.
Am I able to Root using a certain method? I tried Saferoot, but that was a
no go. I have also heard through my searches of "Kingo", which
I'm hoping to try, given it won't turn this S4 into a brick.
Also in the CF-Auto Root Thread, it states near the Downloads,
that AT&T users shouldn't use it, and go figure I'm on Telus. So also a no go..
Can this darn thing be rooted?!?
C.f.will work on the m Version http://forum.xda-developers.com/showthread.php?t=2293800
Sent from my Nexus 5
jd1639 said:
C.f.will work on the m Version http://forum.xda-developers.com/showthread.php?t=2293800
Sent from my Nexus 5
Click to expand...
Click to collapse
Even though it states ATT has locked Bootloader?
Adizzzle said:
Even though it states ATT has locked Bootloader?
Click to expand...
Click to collapse
The i337 at&t has a locked bootloader. The i337m does not.
Sent from my Nexus 5
jd1639 said:
The i337 at&t has a locked bootloader. The i337m does not.
Sent from my Nexus 5
Click to expand...
Click to collapse
Thanks very much my good sir, I appreciate your insight on this!
the I337M (jfltecan) is NOT the same as the I337 (jflteatt)
i use a I337M (originally bell), cf auto root works perfect
your phone is the same as mine, use cf auto root and flash via odin on pc, it'll work

Battery Drain galaxy s4 att

Ever since I got the KitKat 4.4.4 update my battery has been draining, and I'm not going to get a new battery because I've only had this phone for a short time[emoji27]
Give it a few days, it should improve. If not, you may want to root and install the Greenify app from the Play Store.
StoneyJSG said:
Give it a few days, it should improve. If not, you may want to root and installed the Greenify app from the Play Store.
Click to expand...
Click to collapse
I'll try it, and I'm also going to get cm 12 on it since it's taking Samsung a long time to update it
itzdajosh said:
I'll try it, and I'm also going to get cm 12 on it since it's taking Samsung a long time to update it
Click to expand...
Click to collapse
If you have the at&t sgh-i337 and it's on Android 4.4.4, then you won't be able to install cm 12 due to the locked bootloader. You're only able to boot TW based roms from Safe Strap.
No your right and wrong because twrp recovery already has Loki built into it..
itzdajosh said:
No your right and wrong because twrp recovery already has Loki built into it..
Click to expand...
Click to collapse
no, he's right. no twrp for you
Sent from my Nexus 5 using XDA Free mobile app
jd1639 said:
no, he's right. no twrp for you
Sent from my Nexus 5 using XDA Free mobile app
Click to expand...
Click to collapse
Go to twrps website and click recovery for jflteatt and look at device specific issues and it clearly states that "our images are already modified with Loki"
itzdajosh said:
Go to twrps website and click recovery for jflteatt and look at device specific issues and it clearly states that "our images are already modified with Loki"
Click to expand...
Click to collapse
If you have mdl firmware, yes. But you don't. Safestrap is the only recovery that's going to work and no, cm. Trust me
Sent from my Nexus 5 using XDA Free mobile app
itzdajosh said:
No your right and wrong because twrp recovery already has Loki built into it..
Click to expand...
Click to collapse
itzdajosh said:
Go to twrps website and click recovery for jflteatt and look at device specific issues and it clearly states that "our images are already modified with Loki"
Click to expand...
Click to collapse
LOKI will only work on the MDL firmware running Android 4.2.2 Jelly Bean. You're on 4.4.4 so LOKI won't work. Go ahead and try, it will fail.
Oh well I'll just be stuck like this but I'll try to find a way how to make it work
itzdajosh said:
Oh well I'll just be stuck like this but I'll try to find a way how to make it work
Click to expand...
Click to collapse
Good luck and remember Odin, you'll need it.
Sent from my Nexus 5 using XDA Free mobile app
So your saying that Odin will be able to flash cm12 without Loki? And dose Loki work on 4.4.4??
itzdajosh said:
So your saying that Odin will be able to flash cm12 without Loki? And dose Loki work on 4.4.4??
Click to expand...
Click to collapse
no, I'm saying trying to flash twrp and/or cm and you'll probably need Odin
Sent from my Nexus 5 using XDA Free mobile app
Why?? If wwjoshdew made a video on how to root and install a custom recovery on all Qualcomm variants for example jflteatt he didn't say anything about KitKat wouldn't work with Loki...
itzdajosh said:
Why?? If wwjoshdew made a video on how to root and install a custom recovery on all Qualcomm variants for example jflteatt he didn't say anything about KitKat wouldn't work with Loki...
Click to expand...
Click to collapse
Trust us dude, LOKI won't work on Android 4.4.4 on the sgh-i337. It was a bootloader bypass that was patched when the mk2 firmware OTA update came out. If you try flashing a custom recovery you risk bricking your phone since the bootloader is locked. The only recovery you can use is Safe Strap.
If you want CyanogenMOD or any other roms of the alike such as AOSP based roms, you will need a at&t Galaxy S3 or an international S4 or if I remember right a sprint or t-mobile S4, (don't quote me on though) they have unlocked bootloaders as far as I know.
StoneyJSG said:
Trust us dude, LOKI won't work on Android 4.4.4 on the sgh-i337. It was a bootloader bypass that was patched when the mk2 firmware OTA update came out. If you try flashing a custom recovery you risk bricking your phone since the bootloader is locked. The only recovery you can use is Safe Strap.
If you want CyanogenMOD or any other roms of the alike such as AOSP based roms, you will need a Galaxy S3. It has an unlocked bootloader.
Click to expand...
Click to collapse
Well alright I did a bit of research myself and you guys are right.. Thanks for the help so I wouldn't brick my galaxy s4![emoji2] I think I'm going to get the lg g2 for custom roms and stuff...
Sent from my SAMSUNG-SGH-I337 using Tapatalk
No problemo, glad to help when I can. Thanks for the PM by the way lol.

[Q] Downgrade from OE1?

I just switched back to my GS5 because I broke my iPhone 6. I am currently running 5.0 Baseband G900VVRU2BOE1. I've been trying to Odin back to KItKat. I get a fail in Odin every time. Is there something going on with the bootloader that prevents downgrading?
reverendyummypants said:
I just switched back to my GS5 because I broke my iPhone 6. I am currently running 5.0 Baseband G900VVRU2BOE1. I've been trying to Odin back to KItKat. I get a fail in Odin every time. Is there something going on with the bootloader that prevents downgrading?
Click to expand...
Click to collapse
I am unfamiliar with that build. How about giving us a screens hot of about phone?
This is the screenshot you requested. I have not heard anything about this build, either. Any help is appreciated
reverendyummypants said:
I just switched back to my GS5 because I broke my iPhone 6. I am currently running 5.0 Baseband G900VVRU2BOE1. I've been trying to Odin back to KItKat. I get a fail in Odin every time. Is there something going on with the bootloader that prevents downgrading?
Click to expand...
Click to collapse
It sounds to me like the aboot qfuse counter changed which would mean that there's no going back to any previous FW. It was only a matter of time before they did it since the VZW S4 lollipop update did that.
We won't know until we get ahold of either the update.zip or the odin tar. I have 2 VZW S5's and both refuse to tell me there's an update available even when I Odin back to a stock FW.
Nice. That's what I hated about Apple. You own the phone, yet, still can't do what you want with it. Well, thanks for checking it out.
reverendyummypants said:
Nice. That's what I hated about Apple. You own the phone, yet, still can't do what you want with it. Well, thanks for checking it out.
Click to expand...
Click to collapse
It's most likely more of a Verizon thing than a Samsung thing. Although with the 5.1.1 S5 update on T-Mobile, the kernel prevents rooting and T-Mobile phones are on unlocked bootloaders which means they don't care if you root or install a custom rom so maybe it is becoming more of a Samsung thing now.
reverendyummypants said:
I just switched back to my GS5 because I broke my iPhone 6. I am currently running 5.0 Baseband G900VVRU2BOE1. I've been trying to Odin back to KItKat. I get a fail in Odin every time. Is there something going on with the bootloader that prevents downgrading?
Click to expand...
Click to collapse
Want free advice, next time you see an update dont install it it will better if went to the xda forums for more info
As of now there is no way to downgrade. Someone already looked at the update zip. I guess it night be possible once the full OE1 tar is out..something about downgrading everything except the bootloader
Sent from my SM-G900V using XDA Free mobile app
MuminMohamed said:
Want free advice, next time you see an update dont install it it will better if went to the xda forums for more info
Click to expand...
Click to collapse
the thing is, with Verizon, you can choose to not accept the upgrade a few times, but ultimately, it is forced on you...which is why I rooted my S5 the same week I bought it (to avoid unwanted 'upgrades')
Can I downgrade from OA8?
brettdacosta said:
Can I downgrade from OA8?
Click to expand...
Click to collapse
Yes as long as you do not take the oe1 update you should be good
root and downgrade to kitkat
I have s5 having base-band number g900vvru1boa8 unlocked verizon version. How i can root and downgrade to kitkat version? I need help.
fairy8902015 said:
I have s5 having base-band number g900vvru1boa8 unlocked verizon version. How i can root and downgrade to kitkat version? I need help.
Click to expand...
Click to collapse
Look a few threads up...
s5
ldeveraux said:
Look a few threads up...
Click to expand...
Click to collapse
I can't get to the thread that you have answered. kindly send me the link to the thread as i will be very grateful.
fairy8902015 said:
I can't get to the thread that you have answered. kindly send me the link to the thread as i will be very grateful.
Click to expand...
Click to collapse
Nah, I'm sure you can find it!
Dudash said:
It sounds to me like the aboot qfuse counter changed which would mean that there's no going back to any previous FW. It was only a matter of time before they did it since the VZW S4 lollipop update did that.
We won't know until we get ahold of either the update.zip or the odin tar. I have 2 VZW S5's and both refuse to tell me there's an update available even when I Odin back to a stock FW.
Click to expand...
Click to collapse
The OE1 update prevents downgrading even if you have never flashed anything, correct?
tr4nqui1i7y said:
The OE1 update prevents downgrading even if you have never flashed anything, correct?
Click to expand...
Click to collapse
Correct.
hi guys can you help me my baseband version is g900vvru2bpb1 i dont see oe1 anywhere, and i fail everytime i roll back is this the unflashable unrootable version came this way from ebay
lucasdvega said:
hi guys can you help me my baseband version is g900vvru2bpb1 i dont see oe1 anywhere, and i fail everytime i roll back is this the unflashable unrootable version came this way from ebay
Click to expand...
Click to collapse
Why would you need to downgrade from pb1?

Is root access possible for samsung s5 att ?

New to xda. I need pointed in the right direction. I have a Samsung s5 and want to root it if possible.
Here is my info:
Carrier att locked
Model # Samsung-sm-G900A
Android version 5.1.1
Baseband version G900AUCU4CPA3
Kernel version 3.4.0-5869384 4/27/2016
KNOX version 2.4
I have tried several rooting methods and all have come up short.
Is it possible.
Thanks
terspa said:
Android version 5.1.1.
Thanks
Click to expand...
Click to collapse
I'm also trying to figure this out. I have seen posts claiming it's possible, but I can't even upgrade my same device from 4.4.1 to 5.1.1 how did you do it?
I think the bootloader gets locked once you upgrade to LP with AT&T S5s
*Detection* said:
I think the bootloader gets locked once you upgrade to LP with AT&T S5s
Click to expand...
Click to collapse
Starts locked, was never unlocked.
Sent from my Galaxy S5 using XDA Labs
Rakuu said:
Starts locked, was never unlocked.
Sent from my Galaxy S5 using XDA Labs
Click to expand...
Click to collapse
Just learned this the hard way. Spent my entire day activating my service, flashing my firmware to get root... then in two minutes effed myself over by permanently removing root access with 5.1.1 great.

Upgrade VZW GS5 from Rooted 4.4 to 6.0.1 - HELP!?!

My wife has the launch Verizon Samsung Galaxy S5 and I rooted it immediately after we got it and have not updated it since release. She is ready to upgrade and I'm trying to determine the best route to accomplish the upgrade to the latest version. Any recommendations would be appreciated. I've used ODIN in the past, but can I just use ODIN and load the latest 6.0.1 firmware?
Yes, backup your data and use odin to upgrade..
And a factory reset is highly recommended after upgrade
Verizon (and AT&T) run their devices with locked bootloaders. With the release of Lollipop came enhanced bootloader security which makes rooting very difficult, if not damn near impossible. So yes, you *can* easily upgrade, but subsequent rooting may well be an issue.
http://i.imgur.com/rVnFwJM.jpg
keithross39 said:
Verizon (and AT&T) run their devices with locked bootloaders. With the release of Lollipop came enhanced bootloader security which makes rooting very difficult, if not damn near impossible. So yes, you *can* easily upgrade, but subsequent rooting may well be an issue.
http://i.imgur.com/rVnFwJM.jpg
Click to expand...
Click to collapse
Verizon's can be bootloader unlocked.
Sent from my Galaxy S5 using XDA Labs
Rakuu said:
Verizon's can be bootloader unlocked.
Click to expand...
Click to collapse
Ah.....My bad....thought it was the same encryption method as AT&T...
Rakuu said:
Verizon's can be bootloader unlocked.
Sent from my Galaxy S5 using XDA Labs
Click to expand...
Click to collapse
Can I unlock the bootloader and still flash the latest stock ROM with ODIN and keep the unlocked bootloader?
I would recommend you to install smart switch on your pc and update your phone with it. It is much simpler than using odin. You just plug in your phone and smart switch does the rest
Emre67511 said:
I would recommend you to install smart switch on your pc and update your phone with it. It is much simpler than using odin. You just plug in your phone and smart switch does the rest
Click to expand...
Click to collapse
Thanks but I'm interested in unlocking the bootloader as well. Am I able to keep the unlocked bootloader and use smart switch / ODIN to upgrade to STOCK 6.0.1 and keep the unlocked bootloader?
cowman4000 said:
Thanks but I'm interested in unlocking the bootloader as well. Am I able to keep the unlocked bootloader and use smart switch / ODIN to upgrade to STOCK 6.0.1 and keep the unlocked bootloader?
Click to expand...
Click to collapse
Go to the bootloader unlock thread, much to read there and likely answer all of your questions.
Sent from my Galaxy S5 using XDA Labs
cowman4000 said:
Thanks but I'm interested in unlocking the bootloader as well. Am I able to keep the unlocked bootloader and use smart switch / ODIN to upgrade to STOCK 6.0.1 and keep the unlocked bootloader?
Click to expand...
Click to collapse
Here's the link to the bootloader unlock thread:
http://forum.xda-developers.com/ver...t/rd-unlocking-galaxys-s5-bootloader-t3337909

Categories

Resources