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How to check if bootloader is unlock

Discussion in 'Android Devices' started by ithinkunome, Mar 17, 2016.

  1. ithinkunome

    ithinkunome Newbie
    Thread Starter

    I have samsung S4 AT&T, I know that AT&T locks down the bootloader but still I would like to check it. Is there any code or command through which I can see the status of bootloader ? Like in my Moto X in fastboot mode it says Device Status, is there anything like in Samsung ?

    Im running Android 4.4.4 and rooted.



  2. Best Answer:
    Post #3 by Jfalls63, Mar 19, 2016 (3 points)

    1. Download the Forums for Android™ app!


  3. ithinkunome

    ithinkunome Newbie
    Thread Starter

    This is a ****ing dead forum no one replies in here.

    yes mod BAN me or I will terminate my account by my own.
  4. Jfalls63

    Jfalls63 Android Expert

    Saw your post but didn't answer because as far as I know there is no way to check if the bootloader is locked on Samsung devices. Waited to see if someone with more knowledge than myself would answer. I have a i337 also that is rooted and updated to 5.0 but that is about all you can do with it other than maybe Safe Strap. I don't think it's dead here but most are like me and won't reply unless they have a answer. Sorry no one responded sooner.
  5. KOLIO

    KOLIO Guest

    Mikestony, Jfalls63 and scary alien like this.
  6. scary alien

    scary alien not really so scary

    I think @Jfalls63 is/was spot-on...most folks won't answer if they don't know the answer...no need to get upset, after all, we're all un-paid, volunteer members here just like you.

    Thanks to @Jfalls63 and @KOLIO for your responses here :).

    Edit: I'm also moving this thread to the root section for the SG S4 where is probably best belongs.
  7. Jfalls63

    Jfalls63 Android Expert

    Checked my i747 and i337 in download mode. Is it the Knox Kernel: Lock or the Write Protection: enabled that would be the clue that your bootloader is locked?
    I also know that it is locked on the i337 but those two items are what stand out as different between the S3 and S4. Curious.
    Mikestony and scary alien like this.
  8. KOLIO

    KOLIO Guest

    I'm gonna fwd this thread/question to someone who knows quite a bit more about the exact terminology/status/all-things Samsung than myself.
    Hang tight,prolly won't be too long................. :thumbsupdroid:
    scary alien and Jfalls63 like this.
  9. ironass

    ironass Extreme Android User

    Speak for yourself scary alien...


    In answer to the OP question, Jfalls63's reply in post #3 is spot on. There is no way to tell if the bootloader is locked, (unrootable), until you attempt to root. However, as a rule of the thumb, all recent firmware updates from both AT&T and Verizon, have introduced their own mega locked down bootloaders that prevent rooting or downgrading. See #1.6 of 42 Galaxy S5 models - Dummies Guide.

    This is NOT a Google or Samsung imposition but one that is applied by those 2 carriers and applies to all the recent firmware updates for the S4, S5, S6 and, "possibly", the S7.

    If the OP is on Android 4.4.4 and rooted, then flashing the latest AT&T stock release, if you could get hold of it, will almost certainly render the phone unrootable. Best bet to upgrade would be to flash a pre-rooted stock AT&T ROM that has the old bootloader.

    Bottom line... if you are into rooting, don't get the AT&T or Verizon models. ;)
  10. ithinkunome

    ithinkunome Newbie
    Thread Starter

    I Thank you all for your replies, and I am So sorry from the bottom of my heart for being rude.

    1 question I would like to ask as I'm on Android 4.4.4 and with NJ4 bootloader and rooted, is it possible for me to downgrade to stock MDB (Android 4.2.2) using Odin ?

    Jfalls63 and scary alien like this.
  11. ironass

    ironass Extreme Android User

    You could downgrade by flashing the stock AT&T firmware. However, you will have to re-root after downgrading. The other thing worth considering is that by downgrading, you are losing any of the newer bugfixes and more importantly, the later security updates.
    Jfalls63, scary alien and ithinkunome like this.
  12. ithinkunome

    ithinkunome Newbie
    Thread Starter

    Also after downgrade will my bootloader be unlocked ? if not are there any methods to unlock bootloader while staying on stock ?
  13. ironass

    ironass Extreme Android User

    AT&T and Verizon have been locking their bootloaders since I was knee high to a grasshopper.

    This thread may answer some of your questions...

    [Q] Bootloader unlock Galaxy s4 sgh-i337 4.4.2 kitkat
    Jfalls63 and scary alien like this.
  14. Jfalls63

    Jfalls63 Android Expert

    I'm pretty sure that even the first build for the i337 has locked bootloader. I'm downloading it now from Sammobile. I don't use my S4 except to play with so I don't mind experimenting with it. If you are looking for a way to run a custom ROM, I think TouchWiz based Roms and SafeStrap is the only option. Not going to be able to flash AOSP Roms like CM 13.
    scary alien likes this.
  15. ironass

    ironass Extreme Android User

    Correct Jfalls63. No AOSP ROMs, custom recoveries or custom kernels for AT&T users I am afraid.

    Kim Jong un, Supreme Leader of North Korea, lies awake at night, wondering how he can exercise the same totalitarian control over his people that AT&T has over their customers. ;)
    KOLIO, Jfalls63 and scary alien like this.
  16. ithinkunome

    ithinkunome Newbie
    Thread Starter

  17. Jfalls63

    Jfalls63 Android Expert

    Think it means that Knox will not let you downgrade. Ive got it downloaded but got sidetracked and haven't tried it yet.
  18. ithinkunome

    ithinkunome Newbie
    Thread Starter

    Too bad I will never buy att shit again.

    Anyways I got another issue hope you can help me in this matter as well.

    I wanted to change android mode from enforcing to permissive so I downloaded an app called se mod changer but the problem is that when I select permissive it just revert back to enforcing without any error. I also tried to change mod using terminal but that also revert back to enforcing.

    I tried this app on moto x and s3 and it worked fine.

    Any help will be highly appreciated.
  19. Jfalls63

    Jfalls63 Android Expert

    Not familiar with the app so not going to be any help there. I feel your pain with AT&T. I've been getting away from Carrier branded and Samsung phones for daily use. My current daily driver is a Moto XPE 6.0 that I like as is out of the box. Also a Nexus 6 that I have been playing with Android N. I still pick up broken Samsung phones when I find them. Most are easy to fix and give them to young relatives.
    KOLIO and scary alien like this.
  20. Jfalls63

    Jfalls63 Android Expert

    KOLIO, ithinkunome and scary alien like this.
  21. ithinkunome

    ithinkunome Newbie
    Thread Starter

    Wow you just try to flash your mobile just to help me. Man I must say you and all the other members who contributed in this post a BIG thanks.

    Will follow your link if ever want to upgrade to 5.0.

    I once again thank you all for your help.

    GOD bless
    scary alien and ironass like this.
  22. Jfalls63

    Jfalls63 Android Expert

    Desk drawer full of old phones that I don't mind experimenting with and never been afraid to push a button. Good learning experience trying to get it back working if it borks.
    Happy flashing!
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  23. Jfalls63

    Jfalls63 Android Expert

    Pulled my S4 out of the desk to see what I can do with it. Found a few things at XDA you might be interested in. I managed to install Xposed a few weeks ago without any issues. So far only using Wanam. Located Safestrap and it's thread has a link to roms. My S4 is not for daily use so not hurt much if it borks. Probably flash a few things this weekend.

    scary alien and Mikestony like this.
  24. Jfalls63

    Jfalls63 Android Expert

Samsung Galaxy S4 Forum

The Samsung Galaxy S4 release date was April 2013. Features and Specs include a 5.0" inch screen, 13MP camera, 2GB RAM, Exynos 5410 Octa processor, and 2600mAh battery.

April 2013
Release Date

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