Samsung SM-J200G/DD - Applications management; 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.
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Application settings : Customise the settings for each app.
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 .
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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Notifications : Set whether or not to show notification content on the locked screen and
select which notifications to display.