On your computer, run the command: adb sideload 'filename'.zip Where 'filename' is to be replaced with the name of the file downloaded in Step 1.On your computer, run the command: adb devices This should return a device serial with the 'sideload' next to its name, indicating that your device is connected to the computer in sideload mode.On your phone, select the option 'Apply Update from ADB'.Select the option Apply Update from ADB from the recovery menu.While you hold Power, press the Volume Up button and let go of both buttons quickly. Now press and hold the Power button of your phone. You should see “No command” on your phone screen.On your computer, run the command: adb reboot recovery.Authorize your computer connection on your phone when the prompt comes up on your phone, if this is the first time you are connecting with this ADB computer. Enable USB Debugging on your phone - Go to Settings > About Phone > Tap 'Build Number' 7 times, (optionally) enter your pattern, PIN or password to enable Developer Options, and then navigate to Settings > Developer Options > Enable 'USB Debugging'.Optional but recommended: Verify the SHA-256 checksum of the file you have downloaded to ensure that the file has been downloaded completely and correctly.For convenience, you can rename this file to a simpler name and place the file in the directory where ADB is located on your computer. This method will also work for Google Pixel devices with a locked bootloader. To install the stable build, you need to sideload the appropriate OTA package for your device from Recovery through ADB.

Method 1: Sideload Android 12/12L via Recovery and ADB

Google pixel 3a xl sd card slot