Samsung SM-A9200 User Manual page 21

Basics
Forcing restart
If your device is frozen and unresponsive, press and hold the Power key and the Volume
Down key simultaneously for more than 7 seconds to restart it.
Emergency mode
You can switch the device to emergency mode to reduce battery consumption. Some apps
and functions will be restricted. In emergency mode, you can make an emergency call, send
your current location information to others, sound an emergency alarm, and more.
To activate emergency mode, press and hold the Power key. Alternatively, open the
notification panel and tap
To deactivate emergency mode, tap → Turn off Emergency mode. Alternatively, press and
hold the Power key, and then tap Emergency mode.
The usage time left shows the time remaining before the battery power runs
out. Usage time left may vary depending on your device settings and operating
conditions.
→ Emergency mode.
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Volume Down key
Power key