Unlockbale Bootloader models - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Hi just wondering which models have an unlockable bootloader i am looking to buy one but it needs to have an unlockable bootloader. Thanks

The AT&t version of this phone, SGH-I337 has always had a locked boot loader. There is NO variation of the AT&T model that has an un-lockable boot loader.
As a previous poster told you, the Canadian version of this phone, the SGH-I337M has a boot loader that is not locked to start with.

creepyncrawly said:
The AT&t version of this phone, SGH-I337 has always had a locked boot loader. There is NO variation of the AT&T model that has an un-lockable boot loader.
As a previous poster told you, the Canadian version of this phone, the SGH-I337M has a boot loader that is not locked to start with.
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cheers it seems as though i posted in the wrong area, i was after a rundown on which models of the s4 have a bootloader which is unlockable can be any model number from any country. cheers

Related

Does a factory unlocked Galaxy s5 have an unlocked bootloader

There are some galaxy s5 phones coming up on the local Craigslist that say factory unlocked. Would these have unlocked boot loaders?
Sent from my SAMSUNG-SM-G900A using xda premium
Depends on if its the international one. Cause you can factory unlock an AT&T one. And that doesnt have an unlocked boot loader either way.
kettir said:
There are some galaxy s5 phones coming up on the local Craigslist that say factory unlocked. Would these have unlocked boot loaders?
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Verizon and ATT lock their bootloaders. Most if not all other North American S5's will have unlocked bootloaders. In most cases, The TMobile version is the most unrestricted and capable hansdset. Unless you need a CDMA phone (Verizon, Sprint, US Cellular).
"Unlocked" usually refers to SIM locks.
For completeness there are also Developer model phones for Verizon /ATT that do have unlocked bootloaders. You won't see those very often. They have a different part number and their own firmware. Samsung does not have a good history of providing timely firmware updates for Developer models.
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[Q] is the bootloader going to be unlocked?

Has samsung announced that they will unlock the bootloader? was the s4 with locked bootloader also?
Correct me if I'm wrong, but I think Verizon may be the only one with a locked bootloader.
I actually don't know... if it's only verizon then that's cool.. i am going to buy the unlocked carrier version.
edit: seeing no custom rom, I thought the bootloader was locked
Yea, I'm pretty sure it's just the Verizon model. Every other model has plenty of roms.
yeahman45 said:
Has samsung announced that they will unlock the bootloader? was the s4 with locked bootloader also?
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The bootloader is already unlocked. On my phone and most other S5's as well. You are apparently making some assumption about some particular S5 variant. A minority of carriers do lock bootloaders, but you didn't even tell us what model of S5 you have or are referring to. You should give some context so that we know what you are talking about.
edit: I see that you implied in a follow up post that you meant Verizon. The bootloader on a Verizon S5 is locked at the behest of Verizon, not Samsung. Samsung doesn't lock the bootloader for TMobile, Bell, Rogers, Telus or hundreds of other carriers. Pretty much just Verizon and ATT and a few sundry CDMA carriers that are that restrictive.
There are tons of custom ROMs for carriers that are more reasonable. You can use Safestrap to emulate a limited number of ROMs on Verizon but it's your choice of carrier that is hampering you here.
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ok thx guys I am getting the unlocked/carrier free version .. so should not be a problem thx

Sm-g906s

Is the boot loader unlocked? Has anyone used it on at&t?
I guess this model is pretty rare here in the US.

Bootloader question (not asking if it's unlocked!)

Alright, so as the title says, I'm not asking if the bootloader is unlocked. I know it's not and its quite depressing. Anywho, I was curious what the process of unlocking is. If someone could explain in detail, that'd be awesome. I read somewhere there's something about brute forcing a SHA-256 key or RSA-1024.
If you could explain, I'd love to know!
Thanks!
Don't know about unlock process, but I found some interesting video. Some guy changes imei on g935v. After the process there is unlocked padlock at Samsung boot logo. Does it means that bootloader unlocked?
https://youtu.be/0OWO6fqG3x4
Or look here some guy claims that he flashed g930v to g930f with UAE version . And again unlocked padlock.
https://youtu.be/sIJv2gMygbI
spiderkr said:
Don't know about unlock process, but I found some interesting video. Some guy changes imei on g935v. After the process there is unlocked padlock at Samsung boot logo. Does it means that bootloader unlocked?
Or look here some guy claims that he flashed g930v to g930f with UAE version . And again unlocked padlock.
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When the guy changed the imei did he have to root?
If so that's where the custom padlock came from most likely.
The padlock often means custom binary, which means root/non stock ROM. To see if the bootloader is unlocked you must boot to loader (vol down + power + home? Maybe vol up). There it will tell you if you are unlocked. Cool videos and thanks for sharing!
spiderkr said:
Don't know about unlock process, but I found some interesting video. Some guy changes imei on g935v. After the process there is unlocked padlock at Samsung boot logo. Does it means that bootloader unlocked?
https://youtu.be/0OWO6fqG3x4
Or look here some guy claims that he flashed g930v to g930f with UAE version . And again unlocked padlock.
https://youtu.be/sIJv2gMygbI
Click to expand...
Click to collapse
Guys this g930v to g930f is a really big deal, right? Doesn't having g930f signify the fact we can unlock the bootloader? Or does it have to be the exynos proc?
CyanideHD said:
Guys this g930v to g930f is a really big deal, right? Doesn't having g930f signify the fact we can unlock the bootloader? Or does it have to be the exynos proc?
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Flashing the F firmware is basically like flashing the U firmware. The F's stock phone is Exynos though meaning it's bootloader unlockable. The F firmware itself won't unlock the bootloader unfortunately. I see what you are getting at though. Thanks for taking a look!
CyanideHD said:
Guys this g930v to g930f is a really big deal, right? Doesn't having g930f signify the fact we can unlock the bootloader? Or does it have to be the exynos proc?
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Maltego said:
Flashing the F firmware is basically like flashing the U firmware. The F's stock phone is Exynos though meaning it's bootloader unlockable. The F firmware itself won't unlock the bootloader unfortunately. I see what you are getting at though. Thanks for taking a look!
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Yes, but the F isn't just a different firmware. It's a different phone. Nothing you ever do will change our phone into the F. And you can never flash the F firmware on our phone (or vice versa).
FoxyDrew said:
Yes, but the F isn't just a different firmware. It's a different phone. Nothing you ever do will change our phone into the F. And you can never flash the F firmware on our phone (or vice versa).
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Makes sense, thanks haha!

Bootloader Locked?

I bought my phone from AT&T SM-G955 and i was wondering if it is bootloader unlockable. When i check the model number, it says SM-G955U, but I do not think it can be rooted or bootloader unlockable.
All US S8/+'s are a U variant. (Canadian phones are W, Intl ones are F) It does not mean it's an unlocked model as with previous S versions.
It is not possible to unlock the bootloader.
I believe root has been acheived but it's nothing but problems so I'm not on the up and up with it to be 100% sure.

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