Samsung SM-J320G/DS - Applications; Wallpaper; Themes; Lock Screen and Security

Settings
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Applications
Manage the device’s apps and change their settings.
On the Settings screen, tap
Applications .
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Application manager : View and manage the apps on your device.
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Default applications : Select a default setting for using apps.
Wallpaper
Change the wallpaper settings for the Home screen and the locked screen.
On the Settings screen, tap
Wallpaper .
Themes
Apply various themes to the device to change the visual elements of the Home screen, locked
screen, and icons.
On the Settings screen, tap
Themes .
To download more themes, tap
MORE THEMES .
Lock screen and security
Change the settings for securing the device and the SIM or USIM card.
On the Settings screen, tap
Lock screen and security .
The available options may vary depending on the screen lock method selected.
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Screen lock type : Change the screen lock method.
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Show information : Change settings for the items displayed on the locked screen.
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Unlock effect : Select an effect that you see when you unlock the screen.
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Find My Mobile : Activate or deactivate the Find My Mobile feature. Access the Find my
mobile website (findmymobile.samsung.com) to track and control your lost or stolen
device.