Settings87RAMOn 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.• Google settings: Configure settings for some features provided by Google.Sounds and vibrationsChange settings for various sounds on the device.On the Settings screen, tap Sounds and vibrations.• Sound mode: Set the device to use sound mode or silent mode.• Vibrate while ringing: Set the device to vibrate and play a ringtone for incoming calls.• Volume: Adjust the volume level for call ringtones, music and videos, system sounds, andnotifications.• Vibration intensity: Adjust the force of the vibration notification.• Ringtone: Change the ringtone settings.