Samsung SM-J260G/DS User Manual page 10

Basics
When using the speakers, such as when playing media files or using speakerphone,
do not place the device close to your ears.
• 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 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
Volume key
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.
Power key
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