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SM20 Series
User Manual
4
Trademarks
M3 Mobile and M3 logos are registered as trademarks of M3 Mobile.
M3 SM20 is a registered trademark of M3 Mobile Co., Ltd.
Google, Android, Google Play, YouTube, and other marks are trademarks of Google LLC.
Safety Rules
Do not use the device while driving.
Traffic accidents may occur.
Observe the rules on device use while driving.
Do not touch the power plug with wet hands.
You may be electrocuted.
Be careful when using the battery.
Avoid causing a strong impact on the battery or breaking a hole through it with a sharp
thing.
Do not put water on the battery or submerge it in water.
Do not let the charging terminal of the battery come into contact with a metal material.
Keep the device, battery, or charger away from direct heat sources.
Heat may cause the device to become deformed, or an explosion or fire may occur.
If the device is placed inside a vehicle, the battery may explode due to increase in
temperature.
Do not use the device when there is thunder or lightning.
Lightning or fire may cause the device to break down or you may be electrocuted.
Turn off power of the device when device use is prohibited.
Hazardous or wave-related problem may occur.
Turn off power of the device when you board a plane. The electromagnetic waves
generated from the device may affect the plane’s electronic equipment.
Turn off power of the device when you are in a hospital. Observe the device rules while
in a hospital. The electromagnetic waves generated from the device may affect the
medical equipment in the hospital.
Turn off power of the device in hazardous areas where explosions may occur.
Observe the regulations, instructions, or signs of a hazardous area where explosions
may occur.
Turn off power of the device while refueling.