Foi muito dificil conseguir fazer o Root do Galaxy A10, então coloco aqui alguns passos que deram certo:
Esse artigo me assustou, após fazer o celular virar um tijolo (brick)
Unlocking Bootloader
Normally I wouldn’t provide instructions for this, but since things had changed drastically from previous Samsung devices, and there are some caveats, I figure this would be helpful.
Allow bootloader unlocking in Developer options → OEM unlocking
Reboot your device to download mode. Either use adb reboot download, or use the key combo for your device.
Long press volume up to unlock the bootloader. This will wipe your data and automatically reboot.
Just when you think the bootloader is unlocked, it is actually not! Samsung introduced VaultKeeper, meaning the bootloader will reject any unofficial partitions before VaultKeeper explicitly allows it.
Go through the initial setup. Skip through all the steps since data will be wiped again later when we are installing Magisk. Connect the device to internet in the setup!
Enable developer options, and confirm that the OEM unlocking option exists and grayed out! The VaultKeeper service will unleash the bootloader after it confirms that the user has the OEM unlocking option enabled.
Your bootloader now accepts unofficial images in download mode.
Options: go to Settings -> About device. Tap 7 times on Build number to enable Developer options.
Enable OEM unlock and USB debugging options ( Settings -> Developer options )
To unlock boot loader, you will lose all user data, please backup your personal data.
Switch phone off.. hold both Volume buttons and then connect usb cable from pc to phone.
you will enter the download warning csreen on the device.
select unlock oem, phone will restart and erase all data.
Download the firmware Galaxy A10 that match with your A10 Model number ( SM-A105F, SM-A105G, SM-A105M, SM-A105FN )
Unzip the firmware and extract boot.img.lz4 from AP tar file ( It is normally named as AP_[device_model_sw_ver].tar.md5. ) Copy boot.img.lz4 to your phone and extract it using ZArchiver app and copy boot.img to Internal storage\Download folder.
Install Magisk Manager Canary Release on your phone
In Magisk Manager: Install → Install → Select and Patch a File
Select the boot.img file on Download folder. Magisk Manager will patch the boot.img file and store the output to [Internal Storage]/Download/Magisk_patched.img. Rename Magisk_patched.img to boot.img and convert boot.img to boot.tar using ZArchiver. Copy boot.tar to your PC.
Enter Download Mode : Turn Power off the phone, Press and hold Volume Down + Volume Up keys together then while pressing these keys connecting the phone to PC with USB Cable Data, release all keys when Download Mode appears
Flash boot.tar as AP in ODIN, Important: Uncheck “Auto Reboot” in Options!
Magisk is now successfully flashed to your device! Several steps before you can properly use the device.
Full data wipe is mandatory! Do not skip this step.
Press and hold Volume Down + Power Key, when the screen blank quickly press and hold Volume Up + Power key, when Samsung Logo appears release Power key only, keep pressing Volume Up key in the Android Logo screen with text “Erasing”, when screen blank again Press and Hold Volume Up + Power key. When Samsung Logo appears release Power Key only, keep pressing Volume Up key until Android Recovery Mode Appears. Select Wipe data / Factory reset. Select Reboot system now.
After the device is booted up, do the usual initial setup. It need more time and patient. After finished, You will see Magisk Manager app in app drawer. If not, Install it manually.
Connect the phone to Internet, open Magisk Manager. Magisk Manager will ask to do additional setups. Let it do its job and the app will automatically reboot your device.
Done! You can use Root Checker to check it, Enjoy!
To prevent loosing magisk root after reboot. NEVER REBOOT USING RESTART, just switch phone off with power off
Cheguei a fazer o brick do celular, e tive que recuperá-lo.
Links: rooting, fix, magisk, sequencia botões, firmware, superuser (nao usei), one click root, twrp, backup, twrp no samsung, chimera (nao usei porque nao funciona em maquina virtual), instruc, forum, super user, outro manual
Videos: root a10