Zte U F110 User Manual page 41

function is enabled, the phone can only dial those numbers
starting with the fixed dial number you set. For example, if
you set the fixed dial number to 139, then the phone can
only dial numbers starting with 139.

Change password: You can change the PIN, PIN2 and
Phone password here.
Note: You may be required to input the phone lock code in some of the
security settings interfaces. The default lock code is 1122.
 Connectivity

Bluetooth: See chapter "Bluetooth".

Data account: You can add and view your GSM data and
GPRS usage.
 Restore factory settings
You need to input the correct phone password, and press OK to
restore factory settings.
41