How do you open the Android system?

To turn on the Android system, simply press the device’s power button. If the device is off, hold the power button for a few seconds until you see the brand logo or the screen lights up. Then, you can unlock the screen or enter a password to access the system by swiping on the screen. If your device is already on but the screen is in sleep mode, you can wake it up by pressing the power button once.