[Q] how do I know if I have a locked bootloader? - Galaxy S 5 Q&A, Help & Troubleshooting

I want to root my SM-G900F using CF-Auto-Root, on their page they say that if I have a locked bootloader, my device will probably brick. How do I know if I have a locked bootloader?
Here is the data from my "About device":
Baseband version: G900FDXU1ANE2
Kernel version: 3.4.0-2749468 [email protected] #1 Tue Sep 30 11:14:41 KST 2014
Build number: KOT49H.G900FDXU1ANI3
SE for Android staus: Enforcing SEPF_SM-G900F_4.4.2_0028 Tue Sep 30 11:14:26 2014
Thank you

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[Q] Rooting Galaxy S4

Hi, i recently got my Galaxy S4 and wanted to Root it.
Is there a root out for my device?
Specs:
Model Number: GT-I9505
Android Version: 4.2.2
Baseband Version: I9505XXUAMDC
Kernel Version:
3.4.0-431985
[email protected] #1
Thu APr 11 22:42:13 KST 2013
Build Number: JDQ39.I9505XXUAMDC
Also i wanted to know some information about rooting.
I know that root is getting admin access but im not sure about ROMS and Kernals
Are ROMS the operating system, so after rooting i can use a different operating system?
What is a kernal and do i need it for rooting or is it just needed for ROMS.
Thanks

Note 2 going back to stock - help please :)

Hi all,
I've got a GT-N7100 and I'm currently running Ditto Note 3. I struggled to find which firmware my phone was meant to run on stock. Its a South African phone so I downloaded the XFE 4.1.2 one for South Africa.
I tried installing that and in the process it lost the IMEI. I went back to DN3 and the IMEI is back and all is working. I really want to go back to stock 4.1.2. Is there something I'm doing that's wrong?
Screen when I was still on stock is the following:
Model Number: GT-N7100
Android version: 4.1.2
Baseband version: N7100XXDLK7
Kernel version: 3.0.31-1071214
[email protected] #1
SMP PREEMPT Wed Mar 17 10:33:53 KST 2013
Build number: JZO54K.N7100XXDMC3
Screen on DN3 is the following:
Model Number: GT-N7100
Android version: 4.3
Baseband version: N7100XXUEMJ9
Kernel version: 3.0.31-2138564
[email protected] #1
Wed Nov 20 19:16:05 KST 2013
Build number: DN3 v3.2
Thanks for all the help
http://forum.xda-developers.com/showthread.php?t=2088809
But first back up you're IMEI from the link below, since almost certainly you're gonna lose it, and restore back later.
https://play.google.com/store/apps/details?id=com.yahoo.dr.ketan.efsn7100

[HELP] Rooting my HK S5 SM-G900F

Good Day,
I'm trying to root my SM-G900F WITHOUT tripping KNOX
Baseband Version: G900FZHU1ANI2
Kernel Version :
3.4.0-2741370
[email protected] #1
Wed Sep 10 16:36:01 KST 2014
Build Number: KOT49H.G900FZHU1ANI2
I've already tried the towelroot but it says: Phone not supported, I even tried the modstring but it's having the same error. I'm a newbie on this kind of thing so if possible I need a step by step process on how to root, change kernel etc on this.
Thank You

Please help!

System information
System version: 184.46.10.XT907.Verizon.en.US
Model number: Luge (RAZR M, basically)
Android version: 4.4.2
Baseband version: SM_BP_101031.042.32.86P
Kernel version: 3.4.42-g562f212
[email protected] #1
Wed Aug 6 05:00:52 PDT 2014
Build number: KPA20.10
Build date: Wed Aug 6 04:50:27 PDT 2014
Does anyone know of any root methods? I can't live with this being stock and I want CM12. Towelroot v1 and v3 don't work, and I've seen that there's no known root methods. Maybe there's a way to downgrade?
Anyway, if you can help or at least try to, thank you a lot!
You cannot root or unlock your device at this time. Maybe in the future another exploit will be found, but it is unlikely for quite some time.
Sent from my RAZR M on AOSP Lollipop 5.0.2 from Tapatalk

how to unlock bootloader for t535?

I want to CF Auto Root but it says for me to unlock bootloader. i have searched the entire internet and can't find a guide on how to do it. it just says to turn on oem unlock and it doesnt appear for me. twrp doesnt work for me
if helpful then here is information
Device name: Samsung Galaxy Tab 4
Model number: SM-T535
Android: 5.0.2
Android security update: 2017-03-01
Modem: T535XXU1BQC1
Kernel: 3.4.0-10236903
[email protected] #1
Fri Aug 17 12:58:35 KST 2018
Version number: LRX22G.T535XXS1BRH1
SE for Android: Enforcing
SEPF_SM-T535_5.0.2-1_0072
Fri Aug 17 13:03:54 2018
Security: ASKS v1.2 Release 161011
SMR Mar-2017 Release Q
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