Samsung SM-J330F User Manual page 10

Basics
•
Connectivity 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
•
Using a Samsung-approved screen protector is recommended. Unapproved screen
protectors may cause the sensors to malfunction.
•
Do not cover the proximity sensor area with screen accessories, such as a screen
protector or stickers. Doing so may cause the sensor to malfunction.
Keys
Key Function
Power •
Recents • Tap to open the list of recent apps.
Home
Back
Volume • Press to adjust the device volume.
Press and hold to turn the device on or off.
•
Press to turn on or lock the screen.
•
Press to turn on the screen while the screen is locked.
•
Press to return to the Home screen.
•
Press and hold to launch Google.
•
Tap to return to the previous screen.
•
Tap and hold to access additional options for the current
screen.
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