Samsung SM-T815 - Application Settings; Wallpaper Settings; Lock Screen and Security Options

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 .
Lock screen and security
Options
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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Fingerprints : Register your fingerprint to the device to secure the device or sign in to
your Samsung account. Refer to Fingerprint recognition for more information.
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Device security : Check the device’s security status and scan the device for malware.