Unlock Bootloader – How To Unlock?

floem7

First of all, hello to all people here

I have got Lenovo Tab M10 HD (2nd Gen) with android 11 as it seems it is the best supported model of tablet.

I've read the page:
https://devices.ubuntu-touch.io/device/amar-row-wifi/release/noble/
and I understand I have to unlock bootloader as explained in
https://unlocktechy.com/lenovo-tab-m10-hd-gen-2-unlock-bootloader
and then follow instructions at
https://snapcraft.io/ubports-installer

However, I have no clarity on unlocking bootloader. The page linked above doesn't provide/link software for linux. I've borrowed windows machine to use dedicated USB-drivers but still the linked file is not exe but some dlls.

Are using software provided by lenovo instead is a good idea? Link - https://lenovousbdriver.com/device/lenovo-tab-m10-hd-usb-driver

Second question, how can I backup my original android 11 in case I've screw something?
I don't want to use google account as I own only one for my job.

I'd greatly appreciate support, I'm new in this.

k.nacke

@floem7 said in Unlock Bootloader – How To Unlock?:

However, I have no clarity on unlocking bootloader. The page linked above doesn't provide/link software for linux. I've borrowed windows machine to use dedicated USB-drivers but still the linked file is not exe but some dlls.

For Linux, you can download the platform tools from Google. Most likely, you need to run the tools as root because of missing udev rules. Many distributions provide these tools, e.g. on latest Ubuntu you can install adb and fastboot with sudo apt install adb fastboot. This will also update the udev rules. A good approach is to install the tools from the distribution, and the latest tools from Google, and make sure that the Google version comes first in the search path.

No USB drivers etc. are needed, and no need to download binaries from random websites.

Kai

k.nacke

@floem7 said in Unlock Bootloader – How To Unlock?:

Second question, how can I backup my original android 11 in case I've screw something?

No recommendation for a backup. You can use the Rescue and Smart Assistent from Lenovo (RSA) to reinstall latest stock Android. Sadly, this tool is only available on Windows.
A good strategy is to use RSA to download the firmware file, and save that file. The path is shown in the upper right corner of the UI while the file is downloaded. Either you are fast enough and you can copy the .zip file, or you need to zip the unzip directory yourself. This firmware file contains all the partition images of the devices, and you can flash them via fastboot to restore Android.

Kai

floem7

@k.nacke Many thanks for all information, most of all for linux-specific quidance.

@k.nacke said in Unlock Bootloader – How To Unlock?:

No USB drivers etc. are needed, and no need to download binaries from random websites.

Gooood point, only after a while I realized that the "lenovousbdriver.com" page is not from lenovo. Thankfully I haven't used those files.

@k.nacke said in Unlock Bootloader – How To Unlock?:

A good strategy is to use RSA to download the firmware file, and save that file

I'll definitely do it. In case it would be deleted in the future...

I'll try to install UTouch at weekend and come back with feedback how it goes