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
Data usage View your data usage, and control Mobile Data
More… Flight mode, Default SMS app, Tethering and
portable hotspot, VPN, Mobile networks
Optimize memory Free up unused memory by closing unused
background apps and processes and removing
cache files
Sound Sound levels, ringtones, notifications, vibrate.
Display Brightness, screen timeout, orientation etc.
Storage Check memory status. Mount, unmount or erase
the SD card.