E6853 Can not unlock my bootloader - Xperia Z5 Premium Q&A, Help & Troubleshooting

Hey guys,
i've got a problem with my Z5 Premium and I hope you can help me.
I just got it repaired (flex cable broke) and I wanted to give it a try unlocking the bootloader and later rooting it. Unfortunately it fails already at the first point.
My model is a regular Z5 Premium E6853. I am currently on version 32.4.A.1.5 / R1E.
Everytime I try to unlock my bootloader, it says "FAILED (remote: Command did not succeed)".
I'm starting to run out of ideas and I really want that bootloader unlocked.
Things I checked before:
I octuple-checked the IMEI and the unlock code. I also quadruple-checked my IMEI (phone box, settings, phone pad and service menu)
I did reinstall all drivers and I did install the fastboot drivers using the unsigned drivers (tried with the google drivers too)
I did try to use different USB cables (unfortunately the original one is broken, but I tried it with another Sony cable and some brand-new aftermarket cables)
I did enable OEM unlocking, ADB debugging and untrusted sources in the settings
I did check my bootloader version: it's 0.5
I did check that my bootloader is unlockable. The service menu says "Bootloader unlock allowed: Yes"
Are there any other things I need to do? Like having a valid sim card in the phone (not that I havent tried)?
I hope you guys can help me.
Best regards
Lyrex

Related

[Q] Unable to unlock bootloader

I just bought the phone which is UNBRANDED and check that the BOOTLOADER can be UNLOCKED under the configuration menu. The phone is rooted which I verified through a program. Using Android 4.4.2, Build 14.3.A.0.757.
Tried both the flashtools and the Sony official way with the unlock code.
Flashtools - gives me the error that the bootloader cannot be unlocked. Tells me to unplug the phone and turn it on.
Sony Official way - under the fastboot - it is confirmed the phone was connected but when I go to enter the code - it says failed <remote: command did not succeed.
I also look through other threads and tried adding a new folder under custom in flashtools with my serial number and unlock code from Sony. This did not work for me. I downloaded the latest adk, flashtools etc... with no luck.
Does anyone else have the same issues? I cannot find an answer in any forum. With a locked bootloader, I am limited to a few stock custom roms that doesn't require an unlocked bootloader.
Plug ur phn in different usb port of computer
coolkoushik07 said:
Plug ur phn in different usb port of computer
Click to expand...
Click to collapse
I tried that and it doesn't work.
I think I solve the issue. I went back to using flashtools.
My mistake was that I put the SERIAL folder in Custom folder. Instead, I have to put the SERIAL # folder in the MYDEVICE folder within the Custom directory. After I did that, I click on BLU and it gave the unlock screen with the phone IMEI number and unlock code given from Sony official bootloader unlock email. It says that it unlocked the bootloader.

Help needed to Relock Moto Z Play (XT1635-02/RETGB) bootloader and update from 6.0.1

Ok guys I really need you help. I honestly feel like im losing it as I have not been able to make any progress with this. Believe me I have tried other threads to no avail....
Ok so, I bought this phone but the problem with it is that I cant use google pay due to its unlocked bootloader (bought it like this second hand). I'm on really old firmware (6.0.1, 1 September 2016 Security Patch) as you can see very behind from Oreo or whatever the latest firmware is because I cant get OTA updates due to the unlocked bootloader.
I'm literally just asking for a simple, noob friendly guide which will allow we to relock it and update to the latest firmware so my phone will be perfectly fine for work use.
Please guys. Apologies if I sound annoyed but this has been bugging me for ages. Let me know if I should add anything else.
Much appreciated guys!
EDIT: I Used this guide: https://forum.xda-developers.com/moto-z-play/how-to/guide-relock-bootloader-to-lasted-stock-t3718190 and followed it exactly and enable USB debugging but keep getting "<waiting for any device>"?
bump
Hmm, with the 'waiting for device' issue, do you have the Motorola drivers installed on the computer? https://support.motorola.com/uk/en/drivers Also, if you are running Windows 10 or 8.1, verify that you have driver signature enforcement disabled on your computer, so the Motorola fastboot driver can load properly: https://www.howtogeek.com/167723/ho...8.1-so-that-you-can-install-unsigned-drivers/ or you can try to manually load the fastboot driver when your device is connected to your computer. This should then help your computer communicate with your device when you boot your device to the bootloader for flashing the stock ROM.
Verify also that you have a high quality USB data cable (preferably the original cable) and that you've got your device connected to a powered USB 2.0 or 3.0 port. Double-check the communication between your computer and your device - boot your device to the bootloader, connect to your computer. Open the ADB terminal and enter 'fastboot devices' (without quotes) into the terminal. Press Enter. If communication is working, this command should return your device serial number.
For that guide as well, you do not need to be on a custom ROM to follow it. If you do get your device talking, then extract the stock ROM as per the guide to your ADB folder, and execute both sets of commands to re-lock your bootloader. Be aware that the re-locking will erase your device, so back up if you have not already. OTA updates are not dependent on unlocked/locked bootloader status - as long as you have a firmware build that was deployed on the retgb software channel, you should get OTA updates regardless of whether your bootloader is unlocked or not. However, as you correctly point out, Android Pay does care about the bootloader unlocked status, however, rooting with magisk (to hide your bootloader unlocked status) may help you get Android Pay working if you want to keep your bootloader unlocked. Depending on your work IT requirements though, you may want a locked bootloader and no root to be compliant with the IT regulations.
Good luck either way.
echo92 said:
Hmm, with the 'waiting for device' issue, do you have the Motorola drivers installed on the computer?.
Click to expand...
Click to collapse
I have now installed the program but get "There are no updates for your device at this time. Current Version: N/A"? My USB debugging is enabled.
Thanks for the detailed reply mate. Im going to get some new cables and follow your advice. Might take me a few days as i'm busy with work but definitely am looking forward to fixing my phone once and for all!
Omg it works. I downloaded the Motorola program and opened up adb minimal fastboot whilst in usb debugging. I just pasted everything and it started to work!...oh I also held the volume down button whilst the phone was turning on so it went to a screen with the android mascot. Then I pasted the codes to adbmininal fastboot.
Thanks for all you help mate !!
You can get OTA updates even if your bootloader is unlocked.

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While trying to unlock bootloader I am getting Unknown error(900000) in flash tool. I have googled this issue and the solutions offered in it are not working(suggested to try old versions of flash tool, they wont even login). I have applied for unlocking before 20 days. Tool was showing 360hours wait at that time. attached the screenshot for reference,
I have tried unlocking at two different windows 7 PC, switching on and off - USB debugging. kindly suggest a solution for this.
Edit: Tool logins and detecting the device just fine, It checks the status of device, and in unlocking it goes upto 99% and shows unknown error

unlock bootloader error cat s41

hi to everyone im new in this forum
i had some problem whit the unlock of this phone.
i mailed caterpillar support and they dont help me
i receive the same error on every fastboot command (failed remote:unknown command)
i allow usb debugging and oem unlock but i cant do notting the fastboot mode seems to be useless in this phone
i would unlock my bootloader to install magisk but i cant
someone can help me to solve this issue?
the phone is mtk 6757 based
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i have a pixel xl unlocked not VZW and oem is checked blue enabled but cant unlock BL using all three commands fastboot oem unlock,fastboot flashing unlock and the critical command. Please help. Buyer code uxm and Google open 64
Just to be sure, you also enabled "USB debugging" as well, right?
Have you visited this 2 XLGuide?
Also there are further detailed platform tools steps in the 2 XL link in my sig.
Good luck!
USB enabled yes
Are your SDK Tools the latest version?
Have you tried multiple USB cables 2.0, 3.0, etc.
Do you get a serial number response when typing - fastboot devices
Have you tried multiple USB ports?
If your device is capable of having the bootloader unlocked, both the OP guide and my step by step guide have always worked on the 2 XL.
There is likely an issue with your adb or fastboot commands, or where the fastboot application folder is located.
I got BL unlocked and tried flash all but said error failed to load not enough space?
I got it ty for all your help

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