can't get started on this (problems unlocking bootloader/rooting) - Xperia Z2 Tablet Q&A, Help & Troubleshooting

Android version 6.0.1
i went through the bootloader unlock thing on sonys site but it says its not allowed on my phones hidden menu
can anyone help?
all i want to do is get a rooted 7.x.x rom on the tablet

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Locked or Unlocked Bootloader?

Good evening all.
I have an SGP771 which I have owned for over a year now. I have been reading up about rooting and flashing this device. At the moment I am in a quandary as to whether I can unlock the bootloader or not. When I enter. *#*#7378423#*#* into the dialer and look at the Configuration menu from the service menu the Rooting status reads as Bootloader Unlock Allowed: No. When I enter the Developer Options there is a toggle for OEM Unlocking - Allow the bootloader to be unlocked, which I have switched to on. Developer options are also switched on.
Can anyone tell me if there is any way to root and flash this device?
Many thanks.
Hello @weazil60
Did you make it unlocking your bootloader ? I ve got the same issue with my z4 tablet.
Maybe I am going to apply this guide https://forum.xda-developers.com/z4-tablet/general/guide-safe-bootloader-unlock-restore-t3362391 to see if I can unlock my bootloader that way (they did nt say there are cases it should not work) ...
I am interested in installing LineageOS but not sure if LineageOS plays well with the physical bkb50 bluetooth keyboard ...
Good evening Pierro78.
Unfortunately I received no replies and decided just to stick with using Firefox Focus to avoid ads (this was my main issue).
If you are successful with your modification please let me know.
Best of luck - weazil60.

Moto Z bricked OEM Locked

Hello friends of XDA, I have a big problem between hands, I have a MOTO Z and I had it in android 7.0 since last year the update to andorid 7.1.1 did not arrive and I felt that with android 7 the battery was consumed very quickly, so I tried to find the update to flash it and just about 3 days ago I found it, I proceeded to download it and flash it in fastboot and adb.
The thing is that a few months ago, browsing through my phone (I had already rotated it, and unlocked the bottloader, I decided to re-block the bootloader, and remove the root, which never worked at 100) I got into the developer options, and I saw an option that until then I didn't know about its "OEM Unlock"function, as it was turned on and deactivated because I thought it didn't work.
Returning to the update flashing I proceeded as usual, with the commands, I proceed to restart the device and show the image of the boot of motrola but then it shows me a message in red letters.
"Startup Failed"
"failed to pass validation, backup to fastboot.
I thought it was a compatibility problem with the downloaded version of 7.1.1 so again I decided to flash the stock rom 7.0 but when I finished and restart the same message appeared.
I started to investigate and it seems that the OEM blockade is responsible for not being able to install any Stock Rom, or anything, and now I have a nice brick with Moto mods and I can't use it.
I wanted to unlock OEM in fastboot but nothing. sends message from "ALLOW OEM UNLOCK IN SETTINGS"
There is way to unlock the OEM from pc or fastboot without needing to be unlocked from the android settings, as in my case it is impossible for me,
I'd be very grateful for your help friends, I know it's a bit tedious to read but it's the only phone I have and I feel weird without it on the street.:bueno::bueno::llorando:
I'm with same problem here!
Suckmymfdick17 said:
Hello friends of XDA, I have a big problem between hands, I have a MOTO Z and I had it in android 7.0 since last year the update to andorid 7.1.1 did not arrive and I felt that with android 7 the battery was consumed very quickly, so I tried to find the update to flash it and just about 3 days ago I found it, I proceeded to download it and flash it in fastboot and adb.
The thing is that a few months ago, browsing through my phone (I had already rotated it, and unlocked the bottloader, I decided to re-block the bootloader, and remove the root, which never worked at 100) I got into the developer options, and I saw an option that until then I didn't know about its "OEM Unlock"function, as it was turned on and deactivated because I thought it didn't work.
Returning to the update flashing I proceeded as usual, with the commands, I proceed to restart the device and show the image of the boot of motrola but then it shows me a message in red letters.
"Startup Failed"
"failed to pass validation, backup to fastboot.
I thought it was a compatibility problem with the downloaded version of 7.1.1 so again I decided to flash the stock rom 7.0 but when I finished and restart the same message appeared.
I started to investigate and it seems that the OEM blockade is responsible for not being able to install any Stock Rom, or anything, and now I have a nice brick with Moto mods and I can't use it.
I wanted to unlock OEM in fastboot but nothing. sends message from "ALLOW OEM UNLOCK IN SETTINGS"
There is way to unlock the OEM from pc or fastboot without needing to be unlocked from the android settings, as in my case it is impossible for me,
I'd be very grateful for your help friends, I know it's a bit tedious to read but it's the only phone I have and I feel weird without it on the street.:bueno::bueno::llorando:
Click to expand...
Click to collapse
Try to boot in Fastboot flash twrp and flash ressurection remix rom. It's great rom. Forget about locking. I had the same problem like you as I was trying to flash stock ROM and lock bootloader.
I gave up on this.
knjigo said:
Try to boot in Fastboot flash twrp and flash ressurection remix rom. It's great rom. Forget about locking. I had the same problem like you as I was trying to flash stock ROM and lock bootloader.
I gave up on this.
Click to expand...
Click to collapse
Well, when the root didn't work properly, I flashed the phone again and blocked the bootloader. Will I still be able to install TWPR or should I lose my phone?
Suckmymfdick17 said:
Well, when the root didn't work properly, I flashed the phone again and blocked the bootloader. Will I still be able to install TWPR or should I lose my phone?
Click to expand...
Click to collapse
What do you mean with "I blocked my bootloader"?
Twrp is easy to flash. Root is integrated in ressurection remix rom. And this rom is great. Just try to flash twrp in Fastboot and than ressurection remix with twrp.
Can you boot in Fastboot?
Do you remember what build of 7.1.1 you had on your device before downgrading to 7.0?
If so, I would suggest finding that firmware (the full stock firmware, not OTA updates) or newer if you can, and try to flash that. Since your bootloader is still likely from the 7.1.1 build, a locked bootloader will only permit files matching the same patch level (i.e. from the exact same stock ROM as that bootloader patch) to boot.
If not, then unfortunately there's not a lot we can do. You could wait for a newer firmware to get leaked, but as your device is unable to boot (due to failing the bootloader checks) and you cannot toggle OEM unlocking because you cannot boot, it's a nasty vicious circle that is difficult to get out of. You may have to consider sending your device for service and pay for an expensive motherboard replacement otherwise, since Motorola have a record of your device being unlocked. Your service centre experience may vary.
Only lock a bootloader after ensuring you've flashed all the stock firmware and it is all the same patch level as your bootloader. Hopefully you'll find newer firmware that you can repair with.
tjgibri said:
I'm with same problem here!
Click to expand...
Click to collapse
I solved it, I finally flashed the stock rom to my phone and it works.
Apparently my pc was not flashing the stock rom in adb, and the phone turned off when loading the software. I did it 3 times until I load correctly and start well.
if you have the same problem apparently then OEM Blocking is not responsible. You have to flash the most current rom or the one that you had by default when the brick happened to you, you flash it in a normal way with commands of adb and ready, I would have to come back to life.
download from firmware center MotoZ Griffin the most current rom stock at 7.1.1
echo92 said:
Do you remember what build of 7.1.1 you had on your device before downgrading to 7.0?
If so, I would suggest finding that firmware (the full stock firmware, not OTA updates) or newer if you can, and try to flash that. Since your bootloader is still likely from the 7.1.1 build, a locked bootloader will only permit files matching the same patch level (i.e. from the exact same stock ROM as that bootloader patch) to boot.
If not, then unfortunately there's not a lot we can do. You could wait for a newer firmware to get leaked, but as your device is unable to boot (due to failing the bootloader checks) and you cannot toggle OEM unlocking because you cannot boot, it's a nasty vicious circle that is difficult to get out of. You may have to consider sending your device for service and pay for an expensive motherboard replacement otherwise, since Motorola have a record of your device being unlocked. Your service centre experience may vary.
Only lock a bootloader after ensuring you've flashed all the stock firmware and it is all the same patch level as your bootloader. Hopefully you'll find newer firmware that you can repair with.
Click to expand...
Click to collapse
Thanks for your help friend, I finally flashed it with a recent android 7.1.1 update. Apparently the OEM lockout was not the culprit, but it was an interrupted flash of android 7.1.1 at some point when loading the software to the phone, it would shut down on its own and not complete the installation, which showed me the mentioned message. I didn't realize that and thought it was the OEM blockade.
I finally did it on another pc and it worked. the phone came back to life.
I have one Moto Z2 Force (XT1789-05), bought from coolicool.com, I didn't know device came Unlocked Bootloader, Device rom had problem with many apps, I googled and found one topic in XDA developer to Install Stock Rom, I downloaded and Installed India Rom, it's worked somehow fine, but still had problem, I downloaded Verizon Rom, Android 8, after Installed Android 8 Verizon Rom, Locked device bootloader immediately, now device stuck at Welcome Wizard in Android 8, after select language I got this message: (Please wait, this may take a few minutes) this is proof video (http://ahmn.co/Upload/IMG_0161.MOV), after this issue, device already locked, I can't unlock, because need to go to the Developer Option in Setting, I stucked in Welcome Wizard, there isn't any bypass, So, I start to search in Google, XDA-Forum, Android Central and more, I created many threads, many requests, no one can't help me, I tried to reach google developer support to the tell to me how can I bypass Android 8 Welcome Wizard, there is must be a way, but I can't find it, now I can access to Android Recovery and Bootloader
1. if you help me to FORCE UNLOCK device without need Developer Option in setting my problem will solve
2. If you help me to Bypass Android Welcome Wizard, access setting and enable OEM Unlock
3. If you help me to update the device from Android 8 to Android 9 Verizon ROM via ADB Sideload or Update from SD card in Recovery mode
4. If you have any idea to how can I fix it
Extra Information: I bought Belkin and Uni USB-C to Ethernet Adaptor to help me bypass Android 8 Welcome Wizard, I bought WSKY WIFI Adaptor because device Wifi can't find any network (I found QR setup by tap several times in Language Selection), after this section need to download google device policy apk, my device can't find any Wifi Network and my Ethernet Adaptor can't help me either, So, I just remained with my phone, and I can't do anything,
Please, someone, help me
My Device SKU: XT1789-05

Do I have to enable OEM unlock option again after root?

Okay guys, here is what happened..
I had official Oreo 8.0 android on my A5 2017 so i decided to root it and delete bloatwares and unlock some root required features.
I installed TWRP and successfuly rooted it with MAGISK.
After i deleted some bloatwares i got a lot of spam messagsss with force closed description of system apps i deleted. I restarted my phone and messages didnt appeared anymore so i decided to go in developers settings to see what app are running in background so i can delete them. I enabled developer settings and oem unlock was ON, i disabled developer settings and oem got turned OFF at the same time..
I restarted phone to get rid off spam messages and i got locked...( custom binary blocked by fap).
So i tried to flash stock rom but Odin failed(and error has occured while updating a software was shown on screen), i downloaded latest russian rom and odin failed again.
I decided to visit mobile service, i left phone in service and a guy from service fixed my problem in 2 hours, i asked him how he did it an he said that he did it trough/with server and i got confused about that but anyway when i looked at the system information instead of 8.0 oreo there was 7.0 android so can pls someone tell me how did he downgraded my phone from 8.0 to 7.0 while OEM was off and one more question, AFTER ROOT I install magisk(root my phone) do i have to go to developers settings and enable OEM unlock again or just to leave it how it is( have developers settings unvisible and not touching anything), i dont want to get locked again guys..
Thanks..

Samsung C7 SM-C7000 Factory Locked Failed Root

Hello,
I've been trying to Root my Samsung C7 SM-C7000 phone but I keep getting the error that my phone is factory locked.
Is there a way to overcome this or unlock the phone?
I have read some threads about Enabling OEM Unlock in Developer Options, unfortunately this OEM Unlock is not available in my Developer Options menu no matter how much I tried getting it available by resetting dates.. etc.
Can anyone please help?
Can anyone help regarding this matter please??
Help Please!
Help Please!
@KHAWaNAWA
If option OEM unlock isn't offered in Developer options then phone's boot-loader can't get unlocked: Live with it.
Is it confirmed that OEM unlocking cannot be turned on on my device?
It's Samsung Galaxy C7 SM-C7000
Only to have said it: To root device's Android ( Android 6.0.1 ? ) it's not a prerequisite that phone's boot-loader got unlocked before.
The software on it is Android 8.0.0
I have tried to Root it and it said Factory locked.
KHAWaNAWA said:
I have tried to Root it and it said Factory locked.
Click to expand...
Click to collapse
You probably did it the wrong way.
Well in the download mode it shows me "Installation Failure" and under it
"You need to unlock your device to install a custom OS"
"For more information how to unlock visit samsung.com/cn"
I have even tried Rooting by going through recovery mode then selecting Reboot into Boot-loader, Same error.
@KHAWaNAWA
Look inside here.
Tried that too, same error still, phone is locked.

Galaxy A10 oem unlock does not appear.

Hello, guys, I have a galaxy A10 in which it does not appear oem unlock, I've tried all the tutorials on the internet but none of them work, I have this device since the launch in Brazil, at the time it was android 9, and this oem unlock option always appeared, but as at the time it didn't have a custom rom yet (or I haven't found any) I left it disabled, now in 2021 I saw several custom rom for my device, but after upgrading to android 10, I was no longer able to have the option of oem unlock, I will pass the current configuration of my device.
Galaxy A10 (105M/DS)
Android 10
security patch March 1, 2021
build number A105MUBS6BUC2
is there any way to still be able to root and unlock the bootloader?
I don't care if I have to install rom from other countries, I just want to be able to root and install custom roms.
About the tutorials I saw on the internet, they were just the most common ones like delaying the date and looking for an update, I saw a tutorial in which the person left and entered the developer settings until it appears, I already did a hard reset and tried to make oem unlock appear with all the tutorials.
lTheuSl said:
Hello, guys, I have a galaxy A10 in which it does not appear oem unlock, I've tried all the tutorials on the internet but none of them work, I have this device since the launch in Brazil, at the time it was android 9, and this oem unlock option always appeared, but as at the time it didn't have a custom rom yet (or I haven't found any) I left it disabled, now in 2021 I saw several custom rom for my device, but after upgrading to android 10, I was no longer able to have the option of oem unlock, I will pass the current configuration of my device.
Galaxy A10 (105M/DS)
Android 10
security patch March 1, 2021
build number A105MUBS6BUC2
is there any way to still be able to root and unlock the bootloader?
I don't care if I have to install rom from other countries, I just want to be able to root and install custom roms.
About the tutorials I saw on the internet, they were just the most common ones like delaying the date and looking for an update, I saw a tutorial in which the person left and entered the developer settings until it appears, I already did a hard reset and tried to make oem unlock appear with all the tutorials.
Click to expand...
Click to collapse
I forgot to mention, when I go into download mode, instead of being in the prenormal, mine is in normal.
lTheuSl said:
I forgot to mention, when I go into download mode, instead of being in the prenormal, mine is in normal.
Click to expand...
Click to collapse
Same issue, A107m (a10s) mtk doesn't show the oem unlock after a11 update and i can't find a solution (it is on kg state normal)

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