LG Nexus 4 Quick Start Manual page 27

When Nexus 4 is on, press the Power button again to
put it into sleep mode or wake it up.
To turn off your Nexus 4, press and hold the Power
button until a confi rmation dialog appears. Then touch
OK to complete the shut down.
To restart your Nexus 4 if it becomes unresponsive,
press and hold the Power/Lock key for at least 10
seconds.
TIP: To quickly silence your phone or toggle
airplane mode, press and hold the power
button for one or two seconds to see a quick
confi rmation dialog – even from the lock screen.
NEXUS 4 QUICK START GUIDE 9