Network SIM unlock fail - Galaxy S 4 Active Q&A, Help & Troubleshooting

Network SIM unlock fail - Galaxy S 4 Active Q&A, Help & Troubleshooting

I paid to get an unlock code for my Samsung Galaxy S4 Active SGH-I537 locked to AT&T. I have tried to enter the unlock code given when the phone boots with my other carrier SIM card inserted, but get "Network unlock unsuccessful" error message.
I wrote to the company and they responded with the following instructions:
(Samsung Galaxy S4 Only)
Follow these step carefully, as long as you have the correct code it will work 100% (Your phone must be updated to the latest firmware!)
1. Make sure that the phone PROMPTS for the code with a NON accepted sim card and that your IMEI is correct by dialing *#06#
a. Go to the Dial pad and dial *#0011#
b. Please click your MENU button (Bottom LEFT button) and click BACK on the menu that appears, Nothing will happen do not worry please move to the next step
c. Please click your MENU button AGAIN and this time click KEY INPUT
d. When the Key input box appears please input the number "1" and hit OK
e. You will see a number 1 for a while, please wait until it changes into the SERVICE MENU
f. Please click [1] UMTS > [1] DEBUGGING SCREEN > [6] Phone Control > [6] Network LOCK
g. You will see 3 OPTIONS within Network LOCK
h. Please click on number [1] Perso Sha256 INFO, the screen will change slightly
i. Please hit the MENU button then when the menu pops up please carefully hit BACK to return to the previous screen
j. Next Please click on number [2] Perso Sha256 ON, the screen will change again to a one line message
NOTE: If you see ENABLE_FLAG[1], refer to the notes below. If you see ENABLE_FLAG[0], proceed with step k.
k. Restart the phone on the screen by holding the power button and click RESTART
l. When the phone prompts for the unlock code simply enter the unlock code provided to you
m. Your phone is now permanently unlocked!
*If this is not working, go to Solution #2
*NOTE - If it shows ENABLE_FLAG[1]:
Press menu, select back to go back to the Network Lock menu.
Select [3] Perso Sha256 OFF, then select the first item after.
It will say "Menu not exist".
Press menu, select back, press menu, select back to go back to the network lock menu again.
Select [2] Perso Sha256 ON again, it should now show Enable_Flag[0]
You may continue to step k in the previous instructions.
Click to expand...
Click to collapse
I cannot get pass step e. The Service Menu is inaccessible.
I write to them again and they send me the NCK Network unlock code along with the MCK Defreeze code and the following new set of instructions:
Try Solution #2
Follow these step carefully, as long as you have the correct code it will work 100%
1. Power off and on your phone with different network sim card. "SIM network unlock PIN" or "Enter Network Lock Control Key" screen will appear.
2. Type your Unfreeze code (MCK code) and hit Unlock button. You will get "unsuccessful message" again but don't worry.
3. Now type the Unlock code (Network or NCK code) and hit Unlock button.
*If phone say "Network Lock Succesful" it worked, but if not, proceed to step 4.
4. If you get "unsuccessful" again then hit Dismiss button and type *2767*3855# on phone keypad. (CAUTION! This will reformat all your data!)
5. After phone restarts, type the Unfreeze code (MCK code) when prompted to enter "SIM network unlock PIN" or "Enter Network Lock Control Key" screen and hit unlock button.
It will say "unsuccessful" again, don't worry!
6. Type the Unlock code (Network or NCK code) and hit Unlock button.
7. Your phone should now give you the message "Network Lock Successful"
Click to expand...
Click to collapse
I tried it, but couldn't get past step 4. After I enter the code *2767*3855# , it doesn't do anything.
Ok, so may third time is a charm? No.
Latest set of instructions:
1. Make sure that the phone PROMPTS for the code with a NON accepted sim card and that your IMEI is correct by dialing *#06#
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!
Click to expand...
Click to collapse
This time when I enter the code I am presented withe following screen but the options don't match up. I can not get into the UMTS MAIN Menu.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
I have been given the Network unlock code, defreeze, provider and sub provider keys and none seem to work.
I am on Android version 4.3 and have never rooted and don't want to just yet. At least until the warranty expires.
Kernel version: 3.4.02-2244695
[email protected] #1
Build numer: JSS15J.I537UCUBML2
SE for Android status:
Enforcing
SEPF_SAMSUNG-SGH-I537_4.3_0016
Would appreciate any help.

unlocked s4 active
I managed to sim unlock my S4 active by rooting and downloading this app from market "regionlock away"

I'm still under warranty and don't want to root yet.

It does the same problem!

Frustrated
I figured out hot to get the service menu...
*#0011#
Menu, back, menu, key input "Q" menu, key input 0000
Then I hit UMTS, Debugging Screen, phone control, network lock, and I only get 2 options, not 3...
So where would I go from here? Is there somewhere that I can read what each thing in the service menu does/ means?

s4 9515 no sha256
Hi
@ akt0921, I'm using s4 9515. facing same issue. Did you unlock your phone ? had any chance solving your issue.
Thank you
akt0921 said:
I figured out hot to get the service menu...
*#0011#
Menu, back, menu, key input "Q" menu, key input 0000
Then I hit UMTS, Debugging Screen, phone control, network lock, and I only get 2 options, not 3...
So where would I go from here? Is there somewhere that I can read what each thing in the service menu does/ means?
Click to expand...
Click to collapse

Related

Bootloader unlock HTC DESIRE 510Links updated

Hello guys today im gonna tell you how to unlock bootloader on HTC Desire 510
What you are gonna need?
Adb+fastboot+drivers
(Installing HTC Sync Manager is recommended)
Some brain
Some patience
Links
Htc Sync Manager-http://www.htc.com/us/software/htc-sync-manager/
Adb+Fastboot+Drivers=http://www.mediafire.com/download/qxntl2nbk62ycjx/adb-setup-1.4.2.exe
***When installing Adb and fastboot on installation console anways type in Y so it installs adb+fastboot and drivers
Ok before doing anything backup everything because unlocking bootloader restores phone to out of the box state(everything will be deleted apps,pics,etc) unlocking bootloader doesnt touch external SD but i would recommend to remove it just in case.
Ok first shut phone down remove battery and reinsert it
Then power on phone holding volume down+power
You will see white screen saying software status official
***LOCKED***
etc
Now go into fastboot select fastboot using volume keys and press power button to select
Now connect your phone to computer
Wait for drivers to install
After drivers installed go to C:\adb
In adb folder while holding shift rightclick any empty space and open console
Then type in (fastboot devices) just to check if drivers installed correctly and if device is connected
It will look like this
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Ok then go to http://www.htcdev.com/
Register or login and on home screen press unlock bootloader select all supported devices press yes then tick boxes and continue
Ok in console type in (fastboot oem get_identifier_token) without () and hit enter
If everything is ok it should look like this
If its like that copy text that is selected in picture and return to htcdev.com
scroll down press proceed to step 5
then scroll down again and paste copied text into my device identifier token box and then click submit
Now go to email you used to register on htcdev.com
Now open email from HTCDEV and there should be attached file called Unlock_code.bin download it and put it into adb folder which is located at C:\adb
go back to console and type in (fastboot flash unlocktoken Unlock_code.bin) without () and hit enter
Now go to Desire 510 screen and you will see message
Unlock bootloadeer?
etc
etc
And there will be Yes and No using volume buttons select yes and press power button
***Warning*** your phone will be erased to stock state which means all apps etc will be gone you will have to reinstall every app you had
Ok after its done phone will reboot after screen light up remove your battery and reinsert it and boot into bootloader Volume down+Power and it should say
*** Software status: Official ***
***Unlocked***
AND BOOM your bootloader is unlocked if you have any questions ask i will answer then ASAP

bootloader unlocked sussesful
hi guys all I wanna say is that this thread help me to unlock my bootloader HTC Desire 510 (Cricket USA )
but still no luck on flash recovery or root

Can anyone confirm that Sprint/Virgin version can be unlocked?

rjmohit said:
Can anyone confirm that Sprint/Virgin version can be unlocked?
Click to expand...
Click to collapse
If you talking about bootloader yes Is the same process
Sent from my HTC Desire 510 using XDA Premium 4 mobile app

so can it be use in GSM networks in outside USA by bootloader unlocking or anyway to use desire 510 virgin mobile one outside in USA for GSM network?
PS- this ebay unlocking service seller told me he can unlock 510 virgin one(see attached image),
but any one know that 510 virgin one has ability to work in GSM netwroks?
ebay item -HTC UNLOCK SERVICE

SPYWARE_Holdings_Janath said:
so can it be use in GSM networks in outside USA by bootloader unlocking or anyway to use desire 510 virgin mobile one outside in USA for GSM network?
PS- this ebay unlocking service seller told me he can unlock 510 virgin one(see attached image),
but any one know that 510 virgin one has ability to work in GSM netwroks?
ebay item -HTC UNLOCK SERVICE
Click to expand...
Click to collapse
No unlocked bootloader is a totally different from SIM unlock
Sent from my HTC Desire 510 using XDA Premium 4 mobile app

Links are dead on the first post. Can anyone help? Thanks.

no files copied
Hi. I am having trouble with the install of the ADB. I hit yes as instructed to all questions but it keeps saying zero files copied. What am I doing wrong?

mooseass said:
Hi. I am having trouble with the install of the ADB. I hit yes as instructed to all questions but it keeps saying zero files copied. What am I doing wrong?
Click to expand...
Click to collapse
http://forum.xda-developers.com/showthread.php?t=1413293
Cricket HTC Desire 510 ROOTED and HOTSPOT ?

I just unlocked two Sprint variants. Worked like a charm.

Hi, can I use this method to unlock my HTC Desire 520 ? Thanks

We have 3 HTC phones altogether including the Desire 510.
The HTC Dev site has gone insane, it seems.
I've tried it a whole bunch of times with 5 different browsers, on different PCs, on phones - and even registered/verified a 2nd account - but it refuses to stay logged in.
I go there, log in, and it says: "You are now logged in.", then try to get to the bootloader unlocking page and it tells me I am not logged in !!!
I tried emailing them about this problem, but they never replied.
Is there any other way to accomplish this, please ??
Thanks.

HELP
It wont work HTCDEV keeps coming up with the message:
"404 Page Not Found
The page you have requested does not exist.
If you came to this address from a link found within HTCdev, please contact us to report the error.
Return to the home page."
It happens when I hit submit on the token page. Im already checking with htc to see if they can help me but tech support is always slow and not always helpful.

The HTC Dev site is a lost cause.
We got HTC phones many months ago - tried it - waited - watched - still useless.
Have instead given up on having any HTC phones anymore, the simplest solution.

still does not work for htc desire 300
And there will be Yes and No using volume buttons select yes and press power button
***Warning*** your phone will be erased to stock state which means all apps etc will be gone you will have to reinstall every app you had
Ok after its done phone will reboot after screen light up remove your battery and reinsert it and boot into bootloader Volume down+Power and it should say
*** Software status: Official ***
***Unlocked***
hi,
kindly assist because all procedures have worked except for the last one as quoted above. when I choose yes using power button nothing happens.
Thanks

wolfaas12345 said:
Hello guys today im gonna tell you how to unlock bootloader on HTC Desire 510
What you are gonna need?
Adb+fastboot+drivers
(Installing HTC Sync Manager is recommended)
Some brain
Some patience
Links
Htc Sync Manager-http://www.htc.com/us/software/htc-sync-manager/
Adb+Fastboot+Drivers=http://www.mediafire.com/download/qxntl2nbk62ycjx/adb-setup-1.4.2.exe
***When installing Adb and fastboot on installation console anways type in Y so it installs adb+fastboot and drivers
Ok before doing anything backup everything because unlocking bootloader restores phone to out of the box state(everything will be deleted apps,pics,etc) unlocking bootloader doesnt touch external SD but i would recommend to remove it just in case.
Ok first shut phone down remove battery and reinsert it
Then power on phone holding volume down+power
You will see white screen saying software status official
***LOCKED***
etc
Now go into fastboot select fastboot using volume keys and press power button to select
Now connect your phone to computer
Wait for drivers to install
After drivers installed go to C:\adb
In adb folder while holding shift rightclick any empty space and open console
Then type in (fastboot devices) just to check if drivers installed correctly and if device is connected
It will look like this
Ok then go to http://www.htcdev.com/
Register or login and on home screen press unlock bootloader select all supported devices press yes then tick boxes and continue
Ok in console type in (fastboot oem get_identifier_token) without () and hit enter
If everything is ok it should look like this
Ok then go to http://www.htcdev.com/
Register or login and on home screen press unlock bootloader select all supported devices press yes then tick boxes and continue
Ok in console type in (fastboot oem get_identifier_token) without () and hit enter
If everything is ok it should look like this 
If its like that copy text that is selected in picture and return to htcdev.com
scroll down press proceed to step 5
then scroll down again and paste copied text into my device identifier token box and then click submit
Now go to email you used to register on htcdev.com
Now open email from HTCDEV and there should be attached file called Unlock_code.bin download it and put it into adb folder which is located at C:\adb
go back to console and type in (fastboot flash unlocktoken Unlock_code.bin) without () and hit enter
Now go to Desire 510 screen and you will see message
Unlock bootloadeer?
etc
etc
And there will be Yes and No using volume buttons select yes and press power button
***Warning*** your phone will be erased to stock state which means all apps etc will be gone you will have to reinstall every app you had
Ok after its done phone will reboot after screen light up remove your battery and reinsert it and boot into bootloader Volume down+Power and it should say
*** Software status: Official ***
***Unlocked***
AND BOOM your bootloader is unlocked if you have any questions ask i will answer then ASAP
Click to expand...
Click to collapse
Are u still rocking this device?

i have cricket version
how to obtain S.off?

wolfaas12345 said:
Hello guys today im gonna tell you how to unlock bootloader on HTC Desire 510
What you are gonna need?
Adb+fastboot+drivers
(Installing HTC Sync Manager is recommended)
Some brain
Some patience
Links
Htc Sync Manager-http://www.htc.com/us/software/htc-sync-manager/
Adb+Fastboot+Drivers=http://www.mediafire.com/download/qxntl2nbk62ycjx/adb-setup-1.4.2.exe
***When installing Adb and fastboot on installation console anways type in Y so it installs adb+fastboot and drivers
Ok before doing anything backup everything because unlocking bootloader restores phone to out of the box state(everything will be deleted apps,pics,etc) unlocking bootloader doesnt touch external SD but i would recommend to remove it just in case.
Ok first shut phone down remove battery and reinsert it
Then power on phone holding volume down+power
You will see white screen saying software status official
***LOCKED***
etc
Now go into fastboot select fastboot using volume keys and press power button to select
Now connect your phone to computer
Wait for drivers to install
After drivers installed go to C:\adb
In adb folder while holding shift rightclick any empty space and open console
Then type in (fastboot devices) just to check if drivers installed correctly and if device is connected
It will look like this
Ok then go to http://www.htcdev.com/
Register or login and on home screen press unlock bootloader select all supported devices press yes then tick boxes and continue
Ok in console type in (fastboot oem get_identifier_token) without () and hit enter
If everything is ok it should look like this
If its like that copy text that is selected in picture and return to htcdev.com
scroll down press proceed to step 5
then scroll down again and paste copied text into my device identifier token box and then click submit
Now go to email you used to register on htcdev.com
Now open email from HTCDEV and there should be attached file called Unlock_code.bin download it and put it into adb folder which is located at C:\adb
go back to console and type in (fastboot flash unlocktoken Unlock_code.bin) without () and hit enter
Now go to Desire 510 screen and you will see message
Unlock bootloadeer?
etc
etc
And there will be Yes and No using volume buttons select yes and press power button
***Warning*** your phone will be erased to stock state which means all apps etc will be gone you will have to reinstall every app you had
Ok after its done phone will reboot after screen light up remove your battery and reinsert it and boot into bootloader Volume down+Power and it should say
*** Software status: Official ***
***Unlocked***
AND BOOM your bootloader is unlocked if you have any questions ask i will answer then ASAP
Click to expand...
Click to collapse
worked perfectly

I'm Stuck with Nexus 6 locked Bootloader

I encrypted my phone while it was rooted and somehow I lost everything. The device magically locked the boot loader. I can't seem to find a solution.

Define everything? Can you get into recovery?
Sent from my Nexus 6 using XDA-Developers mobile app

No, I can't even get into recovery. I tried pressing power and volume +, but no lock. There is the android logo with "no command". I can't even unlock the bootloader as it appears that there is no rom so I can't go into developer option. "Device is Locked. Status Code: 2"

No guarantees, and I haven't read this thoroughly myself, but you may be lucky:
http://forum.xda-developers.com/showpost.php?p=66475726&postcount=4

The OP apparently doesn't have a recovery either, which makes flashing the Android N OTA impossible. If that is the case, the device is bricked.

Strephon Alkhalikoi said:
The OP apparently doesn't have a recovery either, which makes flashing the Android N OTA impossible. If that is the case, the device is bricked.
Click to expand...
Click to collapse
Yeah I tried on my windows using minimal adb and fastboot it keeps telling me "check 'allow OEM Unlock' in Developer Options." Now is there a way I can completely erase the phone? I remember on my oneplusone I did it before. I wiped the cache and userdata but no luck.

Thanks, Strephon - I had missed that.
Still, the OP mentions: "the android logo with "no command"".
This post:
http://forum.xda-developers.com/showpost.php?p=66467329&postcount=12
has these comments:
"Steps for solving your problem:
Connect your phone to the computer
On your phone go to the No Command screen and press the three buttons (Vol-UP + Vol-DOWN + POWER) simultaneously [it will take a couple of tries before you succeed]
You will now reach the Android Recovery screen
Select the option "Apply update through ADB"
From the computer execute "adb sideload <OTA_UPDATE_FILE_NAME>.zip"
Wait for a few minutes and you will see the update progress on adb"
Again, I haven't thought this one through (tiring day) but it's worth a shot...

If you have no system, then you've already erased the device. Give the advice by @dahawthorne a shot before calling it a day. You may actually have a recovery still, but it's just not easily accessed.

Oh No! Now it's just the android logo. Fastboot devices appears but no ADB in command prompt.
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

Maybe I'm misunderstanding this last post: " Fastboot devices appears"
ADB commands are for when the device is connected, switched on with USB debugging enabled. If you type "adb devices" in the CMD window you can expect to see "ZGST339FF6 device" or similar. From there you can type "adb reboot bootloader" and the phone will enter bootloader mode. [Edit: the Android image has just loaded on my screen now - that looks like stock recovery].
Once you're in bootloader mode you use fastboot commands. "adb devices" won't work. "fastboot devices" should show "ZGST339FF6 fastboot".
So are you saying that when you enter "fastboot devices" you get a response? Or nothing at all?
Have you done all the required background reading about installing drivers/ADB/fastboot and how to use them? Without actually sitting beside you watching what you're doing we're groping in the dark here...

dahawthorne said:
Maybe I'm misunderstanding this last post: " Fastboot devices appears"
ADB commands are for when the device is connected, switched on with USB debugging enabled. If you type "adb devices" in the CMD window you can expect to see "ZGST339FF6 device" or similar. From there you can type "adb reboot bootloader" and the phone will enter bootloader mode. [Edit: the Android image has just loaded on my screen now - that looks like stock recovery].
Once you're in bootloader mode you use fastboot commands. "adb devices" won't work. "fastboot devices" should show "ZGST339FF6 fastboot".
So are you saying that when you enter "fastboot devices" you get a response? Or nothing at all?
Have you done all the required background reading about installing drivers/ADB/fastboot and how to use them? Without actually sitting beside you watching what you're doing we're groping in the dark here...
Click to expand...
Click to collapse
I get a response when I enter "fastboot devices", and I see the device. However, I can't use the command fastboot oem unlock. It tells me that I have to select enable oem unlocking.

You're not reading the posts that I pointed you to. You need to download the Android N preview OTA and sideload it in that recovery screen via the CMD window. Once you've got Android N on the device you may be able to unlock the bootloader, though I've seen comments about it being greyed out. If you manage to load Android N then at least you have a working device, no? And if you do manage to unlock the bootloader then you can flash whatever ROM you like.

Problem occurs at Step. 4 "Select the option "Apply update through ADB"
I do not get the list of options.....even after Press & hold the Power button. While holding Power, press the Volume up button once. Then release the Power button.

dahawthorne said:
You're not reading the posts that I pointed you to. You need to download the Android N preview OTA and sideload it in that recovery screen via the CMD window. Once you've got Android N on the device you may be able to unlock the bootloader, though I've seen comments about it being greyed out. If you manage to load Android N then at least you have a working device, no? And if you do manage to unlock the bootloader then you can flash whatever ROM you like.
Click to expand...
Click to collapse
Android N Preview 2 grays out the "Enable OEM Unlock" option, while Preview 1 doesn't. The reason the Preview 1 OTA works so well to recover bricked devices is that it is a full system image, signed by Google, and flashable through the stock recovery. The Preview 2 OTA zips are most likely deltas, and thus only include the changes made to the system, rather than the complete system image.

Problem solved. Uninstall all android drivers. Reinstall new ones via google usb installer. Make sure in recovery mode you hit power, volume +, and volume - continuously until you see the options. Thank you all!

So do we understand that you have a working device?

yessiirr!

If your stuck in a locked state and want to downgrade. (Android N grays out OEM unlocking) Go to https://www.google.com/android/beta and opt in using the email your using on the phone. Then opt out. Go to settings and a OTA downgrade will be given.

Bootloader relock after Bootloader was unlocked? & Boot Warning Screen Removal?

Hi Guys,
So i rooted my S10 and got TWRP installed.
But for me it is still unclear, what to do about the first message, that appears when you restart your phone.
Here:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Any Way to remove that?
And also I hear from people they somehow relock their bootloader again.
Didn't understand this step for now or what the use of this was? Maybe someone explain please, so it is clear for everyone.
But when I try this > Start Phone in Recovery > Hold Volume Up to Device Lock Option > Lock the Bootloader & Factory Reset >
it just brings me here and after that it does nothing!
Here - see top left.
it says:
>
VBMETA: Error verifiing vbmeta Image: OK_NOT_SIGNED (3)
CUSTOM VBMETA
VBMETA: No sign Info
VBMETA ,
<
Question 1: Is there a Way to remove the Startscreen Warning?
Question 2: What is the use of relocking the bootloader and how is it properly possible?
Hope this Thread brings some clear view on this.

||||| said:
Hi Guys,
So i rooted my S10 and got TWRP installed.
But for me it is still unclear, what to do about the first message, that appears when you restart your phone.
Here:
Any Way to remove that?
And also I hear from people they somehow relock their bootloader again.
Didn't understand this step for now or what the use of this was? Maybe someone explain please, so it is clear for everyone.
But when I try this > Start Phone in Recovery > Hold Volume Up to Device Lock Option > Lock the Bootloader & Factory Reset >
it just brings me here and after that it does nothing!
Here - see top left.
it says:
>
VBMETA: Error verifiing vbmeta Image: OK_NOT_SIGNED (3)
CUSTOM VBMETA
VBMETA: No sign Info
VBMETA ,
<
Question 1: Is there a Way to remove the Startscreen Warning?
Question 2: What is the use of relocking the bootloader and how is it properly possible?
Hope this Thread brings some clear view on this.
Click to expand...
Click to collapse
This Download screen is waiting for you to connect to your computer and fire up Odin and flash stock firmware.
See my post here:
https://forum.xda-developers.com/ga...bootloader-t3927663/post79698366#post79698366

robbo1947 said:
This Download screen is waiting for you to connect to your computer and fire up Odin and flash stock firmware.
See my post here:
https://forum.xda-developers.com/ga...bootloader-t3927663/post79698366#post79698366
Click to expand...
Click to collapse
Thanks your post was very useful!
After I flashed stock firmware again - do I still have TWRP then?
Scenario 1. Your phone is rooted with Magisk.
Go into Developers options and check OEM options, the switch must be ON (to the right). If it isn't turn it ON.
Turn off your phone. Press and hold the Bixby and Volume-down button, then connect with USB to your computer. (The cable shouldn't be connected until after you press the buttons).
Within seconds of USB connection the Download screen will appear. You will see 3 optiions, choose and Long press volume up and hold button until you see the 2 options at bottom of screen. Choose and hold volume up until screen goes off. Then the S10 logo screen will briefly apppear, before it flicks back to the Download screen with the words 'VBMETA: Error verifying vbmeta image etc' at the top, as the image below.
This is all good so far. Leave the phone exactly as it is with this screen showing and make sure the phone is still connected to the computer.
On your computer, fire up Odin3_v3.13.1, you can leave the Reboot option in Odin ticked. Locate your firmware on your computer and put the 4 file parts (BL, AP. CP and CSC) into Odin.
Let Odin finish.
The phone will reboot ready for setup.
The Unlocked bootloader warning screen will be gone.
Click to expand...
Click to collapse
But why should we relock the bootloader in the first place?
Only so we don't have the bootscreen-warning anymore?
Or does it have some other purpose as well?
And I see what I was stuck at, I didn't flashed the stock firmware, but tried to flash the patched stock rom again.
Because the bootloader was locked, It stuck at the flashing process everytime. So thats basically why this thread was created to bring some clarity about this.

||||| said:
Thanks your post was very useful!
After I flashed stock firmware again - do I still have TWRP then?
But why should we relock the bootloader in the first place?
Only so we don't have the bootscreen-warning anymore?
Or does it have some other purpose as well?
And I see what I was stuck at, I didn't flashed the stock firmware, but tried to flash the patched stock rom again.
Because the bootloader was locked, It stuck at the flashing process everytime. So thats basically why this thread was created to bring some clarity about this.
Click to expand...
Click to collapse
To remove the warning screen and be rooted flash Soldier's Splash Screen Changer.

ExtremeGrief said:
To remove the warning screen and be rooted flash Soldier's Splash Screen Changer.
Click to expand...
Click to collapse
Great Tip! Thanks
Soldier's Splash Screen Changer

re-lock Samsung S20 OEM after flashing
For those who may still be interested in knowing the EASY way of doing this:
This is what i did for the S20 (snapdragon)
After flashing stock firmware, the bootloader (OEM) stays unlocked, meaning that things like GooglePay and some bank apps wont work. The way to fix this is by re-locking the oem after you have flashed your new stock rom. Here are the steps to do that (since it took me a while to figure out and there is hardly any info online) - bear in mind this works if you have NOT tripped Knox and its using a stock rom and do these steps at your own risk - always have a backup just in case:
How to re-lock bootloader (for S20):
1. Turn off your device.
2. Press Volume down + volume up and insert usb cable to your phone to start the download mode
3. Read the text below on the Download Mode screen
to block or unblock the Bootloader.
4.- Long press the vol (+) button to enter unlock mode.
LOCK BOOTLOADER SCREEN:
5. Read the 2 options available, one will say to lock the lock the bootloader, the other to lock. Press the relevant volume button (was down on mine) until the phone restarts (this will erase your data and restart automatically).
6. Go into developer mode and then uncheck the unlocked oem option, restart your phone.
That's it! Now you have a device with an OEM locked, so everything will work as expected, again, as long as its a stock rom and you have NOT tripped Knox by root etc.

Hello,
Can you tell me how did you escape the downloading window (after you tried to re-lock the bootloader). Mine seems to have stuck and I tried to long press Vol Down and Power button, but the phone reboots and comes to this screen again.
I also tried to flash a few rom, but everytime it was blocked by OEM lock. I am not sure what was the CSC of the phone (as I bought it from someone who is now not in my contact). Is there any way I can find the stock rom with limited information?
My phone is Samsung SM-G977B (5G). I just know that it is a european version.
Any ideas?

masrhad said:
Hello,
Can you tell me how did you escape the downloading window (after you tried to re-lock the bootloader). Mine seems to have stuck and I tried to long press Vol Down and Power button, but the phone reboots and comes to this screen again.
I also tried to flash a few rom, but everytime it was blocked by OEM lock. I am not sure what was the CSC of the phone (as I bought it from someone who is now not in my contact). Is there any way I can find the stock rom with limited information?
My phone is Samsung SM-G977B (5G). I just know that it is a european version.
Any ideas?
Click to expand...
Click to collapse
See my post here:
https://forum.xda-developers.com/ga...bootloader-t3927663/post79698366#post79698366

Problem to downgrade noob question

I have the lastest update MR3 so I wanted to flash back to MR2 but everytime I tried to flash_all My phone just restart and get stuck on boot logo, I understand I have to have bootloader unlock, something that I have but everytime I tried to do fastboot flashing unlock_critical Its just restart and get stuck on boot logo, So i dont know what to do sorry for bothering about, but would like some help with it. just adding it say fail write to device on cmd.
Tried too from recovery mode to do adb sideload the firmware, its start but on the phone while been on recovery mode it say installation aborted and gives error 21

https://developer.razer.com/razer-p...165.814666719.1585935357-594647775.1575189888
Unlocking the Bootloader
Enable OEM Unlocking
If necessary, enable OEM unlocking on the Razer Phone:
On Android 7.x, go to Settings > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
On Android 8.x, go to Settings > System > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
Enter Download Mode
Start the Phone in Download Mode with one of the following methods:
Using the adb tool: With the Phone powered on, execute: adb reboot bootloader
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
Unlock the Bootloader
Run this command: fastboot flashing unlock
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
⚠ Caution: This command erases all user data on the Phone.
Unlock the Bootloader Critical Partitions
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
The unlock can be performed with this command: fastboot flashing unlock_critical
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.

bsg19071979 said:
https://developer.razer.com/razer-p...165.814666719.1585935357-594647775.1575189888
Unlocking the Bootloader
Enable OEM Unlocking
If necessary, enable OEM unlocking on the Razer Phone:
On Android 7.x, go to Settings > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
On Android 8.x, go to Settings > System > About phone > tap Build number seven (7) times.
Tap the back button once you see the “You are now a developer” message appear.
Tap Developer options, tap toggle OEM unlocking to enable.
Enter Download Mode
Start the Phone in Download Mode with one of the following methods:
Using the adb tool: With the Phone powered on, execute: adb reboot bootloader
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
Unlock the Bootloader
Run this command: fastboot flashing unlock
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
Caution: This command erases all user data on the Phone.
Unlock the Bootloader Critical Partitions
Enter Download Mode: Plug in a USB cable to connect your Razer Phone to your computer, Power Off the Phone, then turn it on and immediately press and hold the Volume Down button until “Download Mode” appears on screen.
The unlock can be performed with this command: fastboot flashing unlock_critical
Your Razer Phone will show you a confirmation screen. Use the Volume Up/Volume Down buttons for navigation, and press the Power button to select. Your Phone will reboot.
Click to expand...
Click to collapse
Thank you for your response but exactly thats what I do and the razer phone after having to use the compatibility patch for the newest update to MR3, everytime i try to unlock critical just restart and then gets stuck on razer logos

EliasEscolero said:
Thank you for your response but exactly thats what I do and the razer phone after having to use the compatibility patch for the newest update to MR3, everytime i try to unlock critical just restart and then gets stuck on razer logos
Click to expand...
Click to collapse
1. unlock in bootloader
2 unlock critical

bsg19071979 said:
1. unlock in bootloader
2 unlock critical
Click to expand...
Click to collapse
The phone is already unlocked but cant do the unlock_critical because it just restart and on cmd say " FAILED (Write to device failed (Unknown error))
fastboot: error: Command failed"
Wanted to add that even when I try to lock the bootloader it say Fail to on cmd and the phone just restart

help me, i want unlock bootloader FAILED (remote:not allowed in locked state)

how to fix this

fastboot oem unlock
Run that command.
Check if allow oem unlock is enabled in developer settings

Keno_I said:
fastboot oem unlock
Run that command.
Check if allow oem unlock is enabled in developer settings
Click to expand...
Click to collapse
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token verification failed

LMAO, you have a Xiaomi phone?
You got to post your phone model and details dude.
Please provide some details like model os version.

my phones Redmi note 9 merlin

You need to download mi unlock lmao

Step 1
Make sure you have a Mi Account ready.
You should've created one when first setting up your phone, with your phone number and a password.
- If you have it: Double-check you have access to it by attempting to connect on Xiaomi's official website (Login page).
- If you don't: Create one with the Create an account button below the password form (same link as above), then connect to it.
Step 2
On your PC, go to Xiaomi's unlock page and click the colored Download Mi Unlock button.
Step 3
A download should start. Wait for it to finish, move the archive to your desktop and extract its content.
Step 4
Inside the extracted folder, double click the file called miflash_unlock.exe to start Xiaomi's Unlocking program.
Step 5
Read Xiaomi's Disclaimer then agree to their terms, or stop here and leave this thread if you don't.
Step 6
Sign in to your Mi Account we talked about in Step 1.
Step 7
Let's get your phone ready for unlocking.
Go to your phone's Settings > Mi Account and make sure you're logged in.
Now Settings > About Phone and tap the "MIUI Version" box multiple times until it says You are now a developer!
And finally Settings > Additional Settings > Developer Options
Enable the following settings inside Developer Options, and click Accept when warnings pop-up:
OEM Unlocking
USB Debugging
Still in Developer Options, check your Mi Unlock status and click the Add account and devicebutton at the bottom if present.
Make sure to backup your phone's data before continuing on with this tutorial, as unlocking will make it factory reset (wipe)!
Step 8
Alright, all backed up? Confident? Let's get going with the final steps.
Turn off your phone.
Turn it back on into fastboot mode by holding down the Power button AND Volume Down together until it vibrates, you may then let go of the Power Button, but keep Volume Down helduntil you see the fastboot image on your phone.
Connect your phone to your computer with the USB Cable.
Xiaomi's Software should detect it. If not, click on the cog-wheel in the top right, click the Check button to install the driver and follow instructions, then keep going.
Click Unlock, and follow the instructions!
Now there are two possible scenarios
Either you've done all this before and can have your phone unlocked right away.
Or this is the first time and at the end of the progress it'll ask you to wait ~7days, and, well, there's no way around that, socome back in 7 days and start from Step 8 again.
And there you go! Your phone will reboot and you can set it all up again, with the ability to follow the rooting tutorial below, and you can also install custom ROMs/recovery!

It worked?

You can't unlock bootloader manually.
You need to do the steps sent by @Keno_I
Good luck

okey thanks master

No problem

@Keno_I Hey Kenora,
The command you said at the starting of the thread,
Will it work on vivo Phones?
Please reply as fast as you can.
Thanks.

If i do keno guide im gonna lose contact, text, images etc from my phone? If yes how i can backup everything before try unlock. Thanks

tehsnou said:
If i do keno guide im gonna lose contact, text, images etc from my phone? If yes how i can backup everything before try unlock. Thanks
Click to expand...
Click to collapse
Yes, the phone will perform a complete factory reset and you'll lose all you data and gor the backup part I don't know but you can get various articles on google

Kenora_I said:
Step 1
Make sure you have a Mi Account ready.
You should've created one when first setting up your phone, with your phone number and a password.
- If you have it: Double-check you have access to it by attempting to connect on Xiaomi's official website (Login page).
- If you don't: Create one with the Create an account button below the password form (same link as above), then connect to it.
Step 2
On your PC, go to Xiaomi's unlock page and click the colored Download Mi Unlock button.
Step 3
A download should start. Wait for it to finish, move the archive to your desktop and extract its content.
Step 4
Inside the extracted folder, double click the file called miflash_unlock.exe to start Xiaomi's Unlocking program.
Step 5
Read Xiaomi's Disclaimer then agree to their terms, or stop here and leave this thread if you don't.
Step 6
Sign in to your Mi Account we talked about in Step 1.
Step 7
Let's get your phone ready for unlocking.
Go to your phone's Settings > Mi Account and make sure you're logged in.
Now Settings > About Phone and tap the "MIUI Version" box multiple times until it says You are now a developer!
And finally Settings > Additional Settings > Developer Options
Enable the following settings inside Developer Options, and click Accept when warnings pop-up:
OEM Unlocking
USB Debugging
Still in Developer Options, check your Mi Unlock status and click the Add account and devicebutton at the bottom if present.
Make sure to backup your phone's data before continuing on with this tutorial, as unlocking will make it factory reset (wipe)!
Step 8
Alright, all backed up? Confident? Let's get going with the final steps.
Turn off your phone.
Turn it back on into fastboot mode by holding down the Power button AND Volume Down together until it vibrates, you may then let go of the Power Button, but keep Volume Down helduntil you see the fastboot image on your phone.
Connect your phone to your computer with the USB Cable.
Xiaomi's Software should detect it. If not, click on the cog-wheel in the top right, click the Check button to install the driver and follow instructions, then keep going.
Click Unlock, and follow the instructions!
Now there are two possible scenarios
Either you've done all this before and can have your phone unlocked right away.
Or this is the first time and at the end of the progress it'll ask you to wait ~7days, and, well, there's no way around that, socome back in 7 days and start from Step 8 again.
And there you go! Your phone will reboot and you can set it all up again, with the ability to follow the rooting tutorial below, and you can also install custom ROMs/recovery!
Click to expand...
Click to collapse
I ****ing love this guide thank you sm

How to turn off phone when it is in FASTBOOT mode? It always return to fastboot mode

pianomans said:
How to turn off phone when it is in FASTBOOT mode? It always return to fastboot mode
Click to expand...
Click to collapse
If you have a vivo or xiaomi phone you can try the Fastboot command `fastboot reboot`.
If you are on phones like Samsung or Oneplus you can press down the Volume down + Power key for force reboot (only works for selective devices.)

Database Develop

welcome