or system modifications. Signing ensures the device's recovery system can verify the update's authenticity before installation. Android Open Source Project Core Components A standard update-signed.zip includes several key files within its structure: META-INF/com/google/android/update-binary : The executable that performs the update. META-INF/com/google/android/updater-script
Used primarily for flashing custom ROMs or modified system files on rooted devices. : Boot into your custom recovery (e.g., TWRP Recovery ). update-signed.zip
Guide: Manually update to v12 (or other firmware) through ADB or system modifications
"Use the dual-pane layout to select your update.zip and use the built-in encryption or archiving tools to create or verify signed packages directly on your Android device". Which one are you looking for? update-signed.zip