Settings89RAMOn the Settings screen, tap Smart Manager → RAM.To speed up your device by reducing the amount of RAM you are using, tap END ALL to closeall background apps.Device securityCheck the device’s security status. This feature scans your device for malware.On the Settings screen, tap Smart Manager → Device security.ApplicationsManage the device’s apps and change their settings.On the Settings screen, tap Applications.• Application manager: View and manage the apps on your device.• Default applications: Select a default setting for using apps.• Application settings: Customise the settings for each app.SoundChange settings for various sounds on the device.On the Settings screen, tap Sound.• Sound mode: Set the device to use sound mode or silent mode.• Volume: Adjust the volume level for music and videos, system sounds, and notifications.• Notification sounds: Select a default notification sound. You can also change thenotification settings for each app.