Zte Z852 - Device

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USB Tethering
Touch the Home key > > Settings > More > USB
tethering to share your phone’s mobile data connection with a
PC via USB so that you can access the Internet on the PC
using the phone. See Share Your Mobile Data Connection via
USB.
VPN
Touch the Home key > > Settings > More > VPN to set up
and connect to virtual private networks. See Connecting to
Virtual Private Networks.
Network Settings Reset
Touch the Home key > > Settings > More > Network
settings reset > RESET SETTINGS to reset all network
settings, including Wi-Fi, mobile networks, and Bluetooth.
Device
Display
Touch the Home key > > Settings > Display to configure
the following options.
 Brightness level: Set the brightness of the display.
 Adaptive brightness: Automatically adjust screen
brightness.