Asus Zenfone 9 User Manual page 13

Turning your ASUS Phone on or off
Turning your device on
To turn your device on, press and hold the power button until your device vibrates and starts up.
Turning your device off
To turn your device off:
Press and hold the power button, then when prompted, tap Power off.
Sleep mode
To put your device in sleep mode, press the power button once until the screen turns off.
NOTE: When your system is down, press and hold the Volume Down Key + Power Key simultaneously
for 8 seconds to restart your phone. If this doesn't work, try again by pressing and holding the keys
again for 12 seconds.
Power key
Chapter 1: Basics 13