In this tutorial, we show you how to unlock the bootloader on the Pixel 4a.
Note: THIS WILL ERASE EVERYTHING on your phone! Backup everything before preceding!!!
Step 1. Go to Settings->About phone. Scroll to the bottom and tap on “Build number” 5 times until it says, “You have enabled Developer options”.
Step 2. Tap the back button to go back to main Settings menu then tap on System->Advanced->Developer options.
Step 3. Turn on OEM unlocking.
Step 4. Power off your phone. Then hold down Volume Down + Power keys to enter the fastboot mode and coonect your phone to your computer.
If using Windows, make sure drivers are installed correctly by going to Control Panel and look for “Android ADB” or “Android Debugging Interface” or something similar to it. If you don’t see it, install these drivers here:
Step 5. Download fastboot.zip and unzip and you should get a folder called “fastboot”.
Step 6. Open a command prompt and type:
fastboot flashing unlock
chmod 755 *
sudo ./fastboot-linux flashing unlock
chmod 755 *
./fastboot-mac flashing unlock
Step 7. Go on your phone, use the Volume keys to select “Yes” to unlock the bootloader and press the Power button.