The first thing you always have to do before you can start your customization game with most phones is to unlock the bootloader. This unlocks the true potential of the device and allows you to install TWRP, Magisk, custom ROMs, and other mods as root. No matter what you want or need, there is no way around it – the boot loader must be unlocked to change the system.
The boot loader on your phone is a program that starts with official system files during startup. By default, the boot loader loads only the default firmware, but once unlocked, you can boot any firmware of your choice. That makes modding possible. Fortunately, Google has made it easy to unlock the boot loader for the Pixel 3a and 3a XL.
- Unlocking the bootloader restores your device to factory defaults.
- Your phone is now failing SafetyNet checks, but Magisk can fix this.
- Unlocking Bootloader will not invalidate your Pixel Guarantee.
Step 1: Enable Developer Options
By default, the setting that you must enable to unlock the bootloader is hidden. To show this setting again, navigate to the following location in the "Settings" menu.
Settings -> By Phone
Scroll down the Phone menu and quickly tap the Build Number entry seven times, one at a time, until you see a toast message titled "You're a developer now" becomes. You may be asked to enter your password or PIN if security measures are in place. However, if you entered them correctly, you can proceed to the next step.
Open Now From the Settings main menu, select System, tap Advanced, and then choose Developer Options. Look for the OEM Unlock option and tap it once to bring up another prompt as before. If necessary, enter your password or PIN and then tap the "Activate" button in the popup to confirm your selection.
After Setting Your Phone to Enable the Bootloader To unlock it, it's time to actually unlock the bootloader. Press and hold the power button and press "Power Off" to completely turn off the phone. After turning off the phone, press and hold the power key and the volume key at the same time until the main menu of the fastboot mode is displayed.
You'll Do It Now Just leave your phone in Fastboot mode while preparing your computer for the next part of the manual.
To unlock the bootloader, you must install ADB and Fastboot files on your computer so that you can execute the correct commands. This includes downloading Google's easy-to-use SDK Platform Tools package, which greatly simplifies the whole process. Follow the link below to get started quickly. Then you can proceed to the next step here.
To unlock the bootloader, you need to open a command window in the platform-tools folder that you used in the previous one Have installed step. It is important that you open the command window in the correct directory so that your phone can interact with your computer through ADB or Fastboot. Follow the link below to make the settings and prepare your command window for the final step.
As When you unlock the bootloader, the device will revert to factory settings. Make sure all critical data is backed up to a computer to keep it safe until the process of unlocking your boot loader is complete.
Now you want to make sure that the command window in your platform tools folder is open before proceeding to the next part. In the newly opened command window, enter the following command and press Enter to continue.
Fastboot Flashing Unlock
Note: Mac and Linux users will most likely need to add a period and a slash before entering any of the commands listed here (eg ./fastboot flashing unlock).
If you enter the above command, you should be asked if you are sure you want to unlock the bootloader. Use the volume keys to highlight "Yes" and press the power key to select it.
From there, the device is automatically reset to the factory settings and then restarted. If the reboot does not happen automatically, use the volume keys on the Fastboot menu to navigate. You want to highlight the "Start" option and then press the power button to confirm the selection. Once the factory reset is completed, the system reboots to the main "Hi there" screen. Your bootloader is unlocked now!
From this point on, you can perform the initial setup as before and put your phone back into service. As a side note, when the phone restarts, a new message appears, such as "The bootloader is unlocked and the integrity of the software can not be guaranteed." This happens regularly and has no negative impact on your system.