Samsung SM-A750F User Manual page 11

Basics
Be careful not to expose the camera lens to a strong light source, such as direct
sunlight. If the camera lens is exposed to a strong light source, such as direct sunlight,
the camera image sensor may be damaged. A damaged image sensor is irreparable
and will cause dots or spots in pictures.
• C onnectivity problems and battery drain may occur in the following situations:
– If you attach metallic stickers on the antenna area of the device
– If you attach a device cover made with metallic material to the device
– If you cover the device's antenna area with your hands or other objects while
using certain features, such as calls or the mobile data connection
• U sing a Samsung-approved screen protector is recommended. Unapproved screen
protectors may cause the sensors to malfunction.
• D o not cover the proximity/light sensor area with screen accessories, such as a
screen protector or stickers. Doing so may cause the sensor to malfunction.
• D o not allow water to contact the touchscreen. The touchscreen may malfunction
in humid conditions or when exposed to water.
Hard keys
Key
Power
Volume
Function
• P ress and hold to turn the device on or off.
• P ress to turn on or lock the screen.
• P ress to adjust the device volume.
https://www.mobile-manuals.com/
Volume key
Power key
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