Go to Settings > System > About Phone > Software Information . Tap on Build Number 7 times.
: Open a terminal or command prompt window in your ADB folder and type the following command: adb reboot bootloader .
: Once in the Recovery menu, use the Volume keys to navigate to Enter fastboot and confirm your choice with the Power button. Method 2: Using ADB (PC Required)
This method is ideal if your phone is functioning and you don’t want to use a PC.
: Connect your phone to a computer with ADB and Fastboot tools installed.
screen appears (often featuring an Android mascot), release both buttons. keys to scroll through options and the button to confirm a selection. Method 2: ADB Command (Via Computer)
: Press and hold the Power button and select Power off to shut down the device completely.
: Simultaneously press and hold the Power button and the Volume Up button .