how to unlock bootloader on zte z820 does not appear fastboot mode ... - Android Q&A, Help & Troubleshooting

Hi all...
I've been trying to unlock the bootloader of zte z820 to get to cook and port rom to this device the first thing I did was to carry a recovery twrp but upon installing it I get a blocking message that tells me that the bootloader has been blocked, I tried to unblock it but enter the bootloader menu does not appear fastboot mode I tried to enter by adb without success I researched a bit of how to force it but I can not find anything if someone has happened the same with another phone and knows something that can help me I would appreciate the data very much most relevant of the cell are; model zte z820 metro pc processor mtk 6735, I can enter the development mode and activate debug usb and unlock oem and I have also rotated it with kingroot, I would really appreciate your help ...

Related

Lenovo A5000 (MT6582) bootloop after unlocked bootloader.

hi guys, thought i would just hit a new thread.
My problem is, i tried to install custom rom.
When i was in fastboot initiate command # fastboot oem unlock (serial #).
Lenovo give press Vol up for Yes, Vol down for No. i hit no and it unlocked the secureboot. now. i iniate another command # fastboot flash recovery recovery_twrp.img.
and there it keeps looping the lenovo logo. i cant access ADB and fastboot. Tried to install drivers for mediatek and lenovo preloader usb vcom. but it cant stablize because it keeps looping.
Any ideas pls?
tried spflash tool but got scatter error 8417.
Maybe flashing a wrong version of twrp recovery image is the cause right? if i can only access back fastboot.....
guys i manage to pull my bricked unit now. i successfully detect it to sp tool. but i need help now regarding where to get this firmware:
MT6582_SO1
excuse me sir, i knew this isn't an answer to your question but how did you unlock your bootloader? i can't get around mine. i also have a lenovo a5000
Unlock Bootloader
Does anyone know how to unlock the bootloder? on LENOVO A5000

Unlocking bootloader via ADB

Hey all,
So Ive tried to unlock my bootloader but its not working, ive followed the steps from this site to unlock it but its stuck on the unlock bootloader screen. I have two options to choose from yes or no I click yes but it doesnt work, yet I click no and it takes me back to choose from fastboot, recovery and normal. My phone is a Alcatel Pixi 4.
I have enabled developer mode enabled usb debugging. I also have confirmed the RSA fingerprint for the computer. Also I have enabled OEM unlock in dev settings. This is what my cmd prompt window loooks like. I will also take a photo of my alcatel frozen on bootloader screen.
C:\Users\Dan\AppData\Local\Android\android-sdk\platform-tools>adb devices
List of devices attached
5HQGTCEQCAVS7TTS device
C:\Users\Dan\AppData\Local\Android\android-sdk\platform-tools>adb reboot-bootloader
C:\Users\Dan\AppData\Local\Android\android-sdk\platform-tools>fastboot oem unlock
...
This is what my phone looks like that im stuck on.
https://s11.postimg.org/8e2cjxooj/IM...129_172555.jpg
does anyone know why this is happening or know how to fix?
Issue has been solved as the bootloader is unlocked this process is not necessary.

huawei cam-L21 bootlooping

Hi guys i m new here,i have huawei y6ii model cam-L21 and when i power it on it will start auto restarting and i checked the switch on pcb it all ok,what i got is fastboot rescue mode only no recovery mode also not sure usb debug enabled or not,on that fastboot mode i see there phone locked and frp lock status,i tried putting dload files on memory card and updating not working,and i extracted update.app file and i got all system,recovery,boot,cust,persist etc but flasing through fasboot not working,i think bootloader is locked when i use fastboot oem unlock it says nessary to unlock frp,i dont know how to unlock frp and bootloader of that devices please any one help me to fix it lets see someone genius minded people here thanks in advance!!!

Infinix hot s3 bootloader unlock

I can't unlock my infinix hot s3 bootloader
I've enabled developer options, allow oem unlock, and enabled USB debugging.
My PC is setup for adb and fastboot and my device is detected in both modes. And responds to commands
Yet fastboot oem unlock gives me an error
FAILED (remote: oem authentication failed, please get right authentication f')
Also tried fastboot flashing unlock
Same error.
I need help thanks
It's been more than a year, yet no developer, not even root for this device.
Roms available .. i think unlock available also after some time
same issue need developers now
Mahaadev1717 said:
Roms available .. i think unlock available also after some time
Click to expand...
Click to collapse
Any CUSTOM ROM AVAILABLE FOR INFINIX HOT S3?

ZTE Z820 (Obsidian) Cant boot fastboot/bootloader bootloop

I tried using the Tool All In One to unlock the bootloader and manually through the adb and fastboot terminal. ADB recognizes the device even though every time i reboot to bootloader through adb or manually through the phone recovery and manual buttons it never sends me to the bootloader. i was able to flash the stock firmware with SP flash tool. I really just want to install TWRP. i have been able to root this device with Wondershare dr.fone root program. I wanted to get it to work with the All in One tool so i can install TWRP to install custom firmware. If anybody can point me in the right direction on why the bootloader never works and fastboot? Maybe this model the bootloader is unaccessible? And if i cannot get to fastboot to unlock the bootloader can i still install twrp somehow. Also when using fastboot command it shows the device id it just says waiting for device everytime and cannot get it to recognize past that point. Not being able to get past this phone problem has been really bothering me and irritating me lately so hopefully i can get it resolved. I will be back later to see if anybody knows a solution to this. it seems like i have been trying to do the same thing and maybe im right and fastboot mode and the bootloader is locked and currently not possible.

Categories

Resources