Develop Bugs

(Q) How to Check if Bootloader Unlockable

How do i go about checking if i can unlock my bootloader?

sirsmokey said:
How do i go about checking if i can unlock my bootloader?
Click to expand...
Click to collapse
Dial *#*#7378423#*#* to enter service menu. Then enter service info - configuration (the last line states BL unlock allowed status).

[Q] unlocking the bootloader on equipment that the "service info" status is "no"

[Q] unlocking the bootloader on equipment that the "service info" status is "no"
Good morning!
There is already some method / tool, for unlocking the bootloader on equipment that the "service info" status is "no" which allows !
I wanted to finally leave the coustom roms and make real root, so I can install a kitkat rom ...
Best wishes!
"First, you should confirm that it is possible to unlock the boot loader of your phone by checking the service menu. In your phone, open the dialler and enter *#*#7378423#*#* to access the service menu.
In your phone, tap Service info > Configuration > Rooting Status. If Bootloader unlock allowed says Yes, then you can continue with the next step. If it says No, or if the status is missing, your device cannot be unlocked."

I don't think there is any method exist which can allows us( AT&T ion Holder) to unlock bootloader as in service menu its mentioned as "NO".
Hence For Kitkat you have to wait..
If you have any solution ,plz share the link....

[Q] Help with Unlock issue

Hi, I'm hoping someone here might have some suggestions on what to try with my following issue. I need to unlock my i747. I've gotten an unlock code from AT&T, but it flat out does not work. I've called AT&T support 8 times, and they have been no help. they say they are opening a tech support ticket to troubleshoot the issue, but each time they just come back with the same unlock code that fails to work. I'm on stock 4.2.2, it's a phone given to me that's never been rooted or modded in any way.. Can't find any reason why it would fail to unlock. Any suggestions? Thanks in advance!

What bootloader is on your phone? If you have an older bootloader, you may be able to downgrade the phone to 4.1.1 and unlock it using the free method.

Unfortunately, the bootloader is up to date and so I can't roll back. My understanding is that would certainly brick the device if you're not on the old bootloader. Can't understand why a legitimate unlock code would fail to work, anyone seen that before?

Your original post says you're on stock 4.2.2. Can't rollback once you have the 4.3 bootloader.

aha, that's a typo. sorry, meant 4.4.2.

So you're getting the prompt to enter the code and, after entering the code, it is still locked?

I enter the code and it says the unlock failed. then re-prompts. I reboot the phone and continue to get the prompt, and the phone remains locked.

jbmoberly76 said:
I enter the code and it says the unlock failed. then re-prompts. I reboot the phone and continue to get the prompt, and the phone remains locked.
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Click to collapse
Are you entering the code with a non-AT&T sim in the phone?

yes, I am testing with a T-Mobile sim card. that's what triggers the unlock prompt. thanks!

Even though you are getting the prompt to enter the code, try this:
a. Go to the Dial pad and dial *#197328640#
b. Please click on number [1] UMTS > [1] Debugging screen > [8] Phone Control > [6] NETWORK LOCK
c. You will see 3 options
d. Please click on number [1] Perso Sha256 INFO, the screen will change slightly
e. Please hit the MENU button then when the menu pops up please carefully hit BACK to return to the previous screen
f. Next Please click on number [2] Perso Sha256 ON, the screen will change again to a one line message
g. Restart the phone on the screen by holding the power button and click RESTART
h. When the phone prompts for the unlock code simply enter the unlock code provided to you
i. Your phone is now permanently unlocked!

Thank you audit13! That did the trick! I appreciate your detailed response and instructions. I don't understand exactly what we did there, but whatever it was ,it worked!

unlock bootloader SM-J260A

Does anyone know how to root or unlock the bootloader of this phone? I can't find anywhere else on how to do it.

It seems to be pretty similar in all Samsung phones
- Go to settings
- Go to About Phone
- Go to Software information
- Tap Build number 7 times to activate developer options
- Return to settings
- Select developer options
- Activate OEM Unlock
And you should now have an unlocked bootloader

ShaDisNX255 said:
It seems to be pretty similar in all Samsung phones
- Go to settings
- Go to About Phone
- Go to Software information
- Tap Build number 7 times to activate developer options
- Return to settings
- Select developer options
- Activate OEM Unlock
And you should now have an unlocked bootloader
Click to expand...
Click to collapse
it's not there.

yah2000 said:
it's not there.
Click to expand...
Click to collapse
There are two possible reasons why OEM unlock is not on your phone
1) Either the bootloader is not unlockable for this phone (very common for U.S. phones)
or
2) You have RMM lock.
What is this?
You can read all about it here:
https://forum.xda-developers.com/sa...w-to/guide-root-install-twrp-samsung-t3747535
corsicanu said:
How to know if you are locked
There are 3 things at this chapter:
1. "Only official released binaries are allowed to be flashed" message shows up and now you know for sure you got locked outside your phone
2. Missing OEM unlock toggle in developer settings, if your device has FRP
3. "RMM state = Prenormal" in download mode
Click to expand...
Click to collapse

ShaDisNX255 said:
There are two possible reasons why OEM unlock is not on your phone
1) Either the bootloader is not unlockable for this phone (very common for U.S. phones)
or
2) You have RMM lock.
What is this?
You can read all about it here:
https://forum.xda-developers.com/sa...w-to/guide-root-install-twrp-samsung-t3747535
Click to expand...
Click to collapse
It says "kg state=checking" and frp lock off. Nothing about rmm lock.

yah2000 said:
It says "kg state=checking" and frp lock off. Nothing about rmm lock.
Click to expand...
Click to collapse
Then most likely your bootloader will always be locked and no way of unlocking
Too bad

Flash combination file then you can do it if you need to run repairs etc or whatever else you have in mind...
- Go to settings
- Go to About Phone
- Go to Software information
- Tap Build number 7 times to activate developer options
- Return to settings
- Select developer options
- Activate OEM Unlock

yah2000 said:
it's not there.
Click to expand...
Click to collapse
Mine isnt there either.

[HELP]No oem unlock Option

So i have the phone for a year now A505GN/ds and im having a hard time having the oem unlock option appear , and that change date a month back method doesnt work so come on.

dang this is help less

Lynjun002 said:
So i have the phone for a year now A505GN/ds and im having a hard time having the oem unlock option appear , and that change date a month back method doesnt work so come on.
Click to expand...
Click to collapse
So when you go to settings/about phone/software info/ and press mulitple time on Build number the developer options don't appear?
In the developer options you will find the OEM unlock setting

RichyE said:
So when you go to settings/about phone/software info/ and press mulitple time on Build number the developer options don't appear?
In the developer options you will find the OEM unlock setting
Click to expand...
Click to collapse
10 times I believe, then you have to unlock your boot loader, by powering off the device, hold and press both vol buttons and connect to the pc, then you will get prompt, yopu will have to read it as i cant remember what they are, but you need to wipe your device while doing this - it will facorty reset.

Lol no, the oem unlock button is missing in developer options

I had the same issue on mine A505F model while trying to install custom rom.
The thing I noticed OEM unlock wont popup unless your device is registered.
Steps I took:
1. Removed my SIM Card
2. Reset my phone
3. go through first time setup process
4. Connect WiFi
6. Go to settings and enable Developer options
5. Go to settings > software update > Download and install. (A toast notification will show 'Device Registered')
7. Wait a few seconds and check if you got OEM unlock option in dev options.
P.s: a restart might help if you still didnt get it after going through those steps
I hope this helps

Not working

Lynjun002 said:
So i have the phone for a year now A505GN/ds and im having a hard time having the oem unlock option appear , and that change date a month back method doesnt work so come on.
Click to expand...
Click to collapse
How do u do the date changing procedure?
You have to change the date to a month ago and check for updates
Then restart your phone and change the date back and again check for updates.
Be sure to remove your SIM card.

Alijjasghar said:
How do u do the date changing procedure?
You have to change the date to a month ago and check for updates
Then restart your phone and change the date back and again check for updates.
Be sure to remove your SIM card.
Click to expand...
Click to collapse
Remove sim before starting this method?

Lynjun002 said:
Remove sim before starting this method?
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Click to collapse
Yes remove it because your phone might get date and time through mobile networks

Lynjun002 said:
Remove sim before starting this method?
Click to expand...
Click to collapse
Update it to latest firmware

Dont work

It's not the communitys fault the a505u and a505u1 hasn't received root yet
Everyone else is just going for the unlocked versions so the devs are on those...we had only one dev but his phone completely bricked and has no way of reviving it.