At&T Software Update - Zte Z432 User Manual

Fixed Dialing
If you set Fixed Dialing Status to On, you can only dial numbers on the
Fixed Dialing Numbers list. You will need to enter your PIN2 code to use
this feature.
Master Clear/Reset
The Master Clear function will clear all user data and reset the phone
to factory default settings. The Master Reset function will only reset the
phone to factory default settings.
AT&T Software Update
This function will automatically check for updated software for the phone.
If updated software is available, it will download and install the software.
48 Settings