Samsung SM-J500M - Wallpaper and themes; Lock screen and security

Settings
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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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Info and app shortcuts : Change settings for the items displayed on the locked screen.
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Notifications on lock screen : Set whether or not to show notification content on the
locked screen and select which notifications to display.
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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.
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Unknown sources : Set the device to allow the installation of apps from unknown
sources.
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Other security settings : Configure additional security settings.