Bootloader unlocking - Galaxy S 5 Q&A, Help & Troubleshooting

What, precisely, must be done to unlock the bootloader for an SM-G900A or SM-G900T? Must something cryptographically be broken? If I get root access through towelroot, will that help? Are the people at the AT&T store capable of doing this bootloader unlock if pursuaded to do so?

No they will definitely not help you unlock the bootloader lol. AT&T locked it down themselves, and no one has found a way to unlock it yet. All we can do is wait for someone to figure it out.

dgriffi said:
What, precisely, must be done to unlock the bootloader for an SM-G900A or SM-G900T? Must something cryptographically be broken? If I get root access through towelroot, will that help? Are the people at the AT&T store capable of doing this bootloader unlock if pursuaded to do so?
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Can you show what is your Bootloader version?

Just an FYI, 900A is ATT with locked bootloader, the 900T is T-mobile which already has an unlocked bootloader. Just buy a 900T unlock the Sim and put in an ATT Sim. That's what I did. No worries about locked bootloader!

vndnguyen said:
can you show what is your bootloader version?
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g900aucu2ang3

dgriffi said:
g900aucu2ang3
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I think a read something about Safestrap being able to unlock S5 locked bootloaders, here for example. Not sure if this works though, have not tested it myself.

Related

[Q] Bootloader Unlock on Sim Unlocked Rogers XPlay

So it's common knowledge by now that the Rogers Xperia Play cannot be bootloader unlocked due to the sim lock on it. I recently bought one and Sim Unlocked it for use on the Fido network.
Is there anything else stopping me from using the bootloader unlock or am I safe to do it now?
Clyzm said:
So it's common knowledge by now that the Rogers Xperia Play cannot be bootloader unlocked due to the sim lock on it. I recently bought one and Sim Unlocked it for use on the Fido network.
Is there anything else stopping me from using the bootloader unlock or am I safe to do it now?
Click to expand...
Click to collapse
give your imei to sony and see if you eligible for an bootloader unlock code
http://unlockbootloader.sonyericsson.com/instructions#13027233107241&if_height=1139
*Edit* sorry i didnt read your OP well, You have to have a factory unlocked device from the start, you cannot just sim unlock a branded device and get an unlock code sorry
I have mine sim unlocked but as far as I know I still want unlock the boot loader.
Sent from my R800a using XDA Premium App
AndroHero said:
*Edit* sorry i didnt read your OP well, You have to have a factory unlocked device from the start, you cannot just sim unlock a branded device and get an unlock code sorry
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Ah.. that's a bit troublesome. Alright, thanks.
Clyzm said:
Ah.. that's a bit troublesome. Alright, thanks.
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dont worri the Play has only been out a month or two, once the dev scene kicks off, there will be other ways to unlock your bootloader

[Q] bootloader

Been reading about Bootloader and I think I grasp the concept... Does the s 4 (specifically gt i9505) come with locked bootloader? If yes, how can I check if my Bootloader is locked?
dannyella said:
Been reading about Bootloader and I think I grasp the concept... Does the s 4 (specifically gt i9505) come with locked bootloader? If yes, how can I check if my Bootloader is locked?
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Go to download mode. If you see additional lines that say about KNOX that means it's probably locked.
If you got Android 4.2.2 or lower, you don't have locked bootloader.
As far as I know..
dannyella said:
Been reading about Bootloader and I think I grasp the concept... Does the s 4 (specifically gt i9505) come with locked bootloader? If yes, how can I check if my Bootloader is locked?
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No.
It depends on where you got the phone.
Many carriers lock the bootloader to prevent customer's tweaking the device or changing the SIM lock.
However not all carriers do this.
Also factory unlocked and open bootloader phones are sold all over.
Now where did you get the device from and is it on contract or not ?
Sent from my GT-I9500 using Tapatalk

[Q] How to unlock a bootloader if possible? (N900A)

Heya, I'm very new in the vast world of Android rooting and flashing and I've run into yet another problem trying to flash my N900A Note 3 variant. I finally got it SIM unlocked and rooted and just when I'm getting ready to flash I see something about bootloaders. I don't know how to check to see if it's locked but I'm more than certain it is. So, is there anyway to unlock the bootloader? I see people saying it can't be unlocked yet I see guides for unlocking them so really all I'm looking for is a straight answer.
And if I understand it right, Safestrap isn't something I want to do if it's not the 'real' thing, so if it can't be unlocked then I'll be looking into another phone. If I do, would it be better to get another Note 3 variant or the Sony Xperia z1s?
Thanks in advance.
mr_solo1337 said:
Heya, I'm very new in the vast world of Android rooting and flashing and I've run into yet another problem trying to flash my N900A Note 3 variant. I finally got it SIM unlocked and rooted and just when I'm getting ready to flash I see something about bootloaders. I don't know how to check to see if it's locked but I'm more than certain it is. So, is there anyway to unlock the bootloader? I see people saying it can't be unlocked yet I see guides for unlocking them so really all I'm looking for is a straight answer.
And if I understand it right, Safestrap isn't something I want to do if it's not the 'real' thing, so if it can't be unlocked then I'll be looking into another phone. If I do, would it be better to get another Note 3 variant or the Sony Xperia z1s?
Thanks in advance.
Click to expand...
Click to collapse
AT&T models are locked at the bootloader, and there's no way to unlock them.
I have similar question....I have 9005 version and want to put new bootloader.....I put new NF2 modem and now i want to put NF4 bootloader....
Is it enough just to instal it through odin?
(Searched for instructions but couldn't find it.....)
Thanks....
jisoo said:
AT&T models are locked at the bootloader, and there's no way to unlock them.
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Okay, I have a few questions on this subject.
Safestrap is a work-around a locked bootloader right? If I use it to flash a rom would there be that much of a difference?
If using safestrap pretty much the same thing then why do people still prefer to have unlocked bootloader?
Because I see guides to unlocking bootloaders, does this mean that it's just AT&T that won't let us unlock this phone version?
Sorry for the questions, I just want this stuff cleared up.
mr_solo1337 said:
Okay, I have a few questions on this subject.
Safestrap is a work-around a locked bootloader right? If I use it to flash a rom would there be that much of a difference?
If using safestrap pretty much the same thing then why do people still prefer to have unlocked bootloader?
Because I see guides to unlocking bootloaders, does this mean that it's just AT&T that won't let us unlock this phone version?
Sorry for the questions, I just want this stuff cleared up.
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Click to collapse
You can't change the kernel if your bootloader is locked, so safestrap only works with TW-based ROMs -- no cyanogenmod our other AOSP variants.
AT&T is one of the carriers that forces the OEMs to lock the bootloader. I believe Verizon is another one. No other carrier seems to care, or have enough power over the OEMs to force this.

Bootloader Status Check

How can we know if the bootloader is locked or not? Is there a way to know it through adb or through a secret code?
Uzair40 said:
How can we know if the bootloader is locked or not? Is there a way to know it through adb or through a secret code?
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It's only "locked" on 900V and 900A (Verizon and AT&T) variants. Other variants are not locked nor lockable.
jisoo said:
It's only "locked" on 900V and 900A (Verizon and AT&T) variants. Other variants are not locked nor lockable.
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Thanks, but without having that information how can we check if the bootloader is locked or not?
Uzair40 said:
Thanks, but without having that information how can we check if the bootloader is locked or not?
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Click to collapse
I thought I was clear, sorry.
If you have the Verizon or AT&T version, it is always locked. If other version, it is always unlocked.
There are no known ways of locking or unlocking the bootloader on a Samsung device.
jisoo said:
I thought I was clear, sorry.
If you have the Verizon or AT&T version, it is always locked. If other version, it is always unlocked.
There are no known ways of locking or unlocking the bootloader on a Samsung device.
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Thanks again. I already know that besides Verizon and AT&T, all the versions have the bootloader unlocked, but is there a way to know that through adb or a secret code? i.e. If Knox is 0x1 we realise that the device has been rooted, likewise, is there a way to know if the bootloader is locked?
Uzair40 said:
Thanks again. I already know that besides Verizon and AT&T, all the versions have the bootloader unlocked, but is there a way to know that through adb or a secret code? i.e. If Knox is 0x1 we realise that the device has been rooted, likewise, is there a way to know if the bootloader is locked?
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id like to know as well, id like to know through a app or adb or something in that nature let me know if you find out anything TY!
(i just bought a Galaxy Note 3 sim unlocked at&t 4.4.2 sm-n900a)
which i already rooted!
mrdreamers said:
id like to know as well, id like to know through a app or adb or something in that nature let me know if you find out anything TY!
(i just bought a Galaxy Note 3 sim unlocked at&t 4.4.2 sm-n900a)
which i already rooted!
Click to expand...
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Use your phones forum.
http://forum.xda-developers.com/note-3-att
JJEgan said:
Use your phones forum.
http://forum.xda-developers.com/note-3-att
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i have its gotten me nothing so far
in retrospect
I just got my hands on one of these and I'm not sure if the bootloader is locked or not I did a procedure that leads me to believe it is. I am not 100% sure though, and since I am not really a noob, nor of a minor tech, I understand the importance of being 100% certain.
What is the model of the phone according to the phone's screen in download mode? What is the boot loader version?
These two items will help you determine whether the boot loader is locked.
All Canadian Note 3
jisoo said:
It's only "locked" on 900V and 900A (Verizon and AT&T) variants. Other variants are not locked nor lockable.
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Does this "Unlocked bootloader" apply to all Canada versions of the SG Note 3 N900W8 as well? Thanks in advance.

Flashing Motorola firmware on Verizon set

Can I flash official Motorola firmware in VERIZON Droid turbo 2 set? To. Remove all Verizon crap
I am currently on nougat 7.0.0
Simple answer? NO
ferolac said:
Simple answer? NO
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Why please elaborate. Even though hardware is same
earthworm82 said:
Why please elaborate. Even though hardware is same
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because of locked bootloader
ferolac said:
because of locked bootloader
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You can't upgrade because the bootloader is locked. The bootloader is locked because Verizon are money hungry and want to ensure you need an upgrade.
but in developer option there is an option to unlock boot loader isint that suffice ?
bump.
anyone please update
is it or is it not Verizon?
Hi all, I am in no way a developer, found out about this site from a Quora post about *drumroll* rooting a DT2. My question is this: I purchased my phone reconditioned (whatever that entails) from Amazon. It does not have the Verizon check mark on the bottom--does that mean I can root it? Please help!
Toxonuts said:
You can't upgrade because the bootloader is locked. The bootloader is locked because Verizon are money hungry and want to ensure you need an upgrade.
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Could we trick the DT2 into believing its an update for it, but then update the firmware to unlock the bootloader?... How does Verizon update the firmware themselves if the bootloader is locked?

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