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Tap Options > System Settings from the Home Screen:
SETTINGS MENU
Wi-Fi
Connect to Wi-Fi devices and Networks
Bluetooth
Connect to Bluetooth devices and Networks
Call Settings
Configure Ringtones, Vibrate, Voicemail, etc.
Data usage
View your data usage, and control Mobile Data
More…
Flight mode, Default SMS app, Tethering and
portable hotspot, VPN, Mobile networks
Sound
Sound levels, ringtones, notifications, vibrate.
Display
Brightness, screen timeout, orientation etc.
Storage
Check available memory.
Mount or unmount the SD card.
Battery
See what has been consuming your battery power.