Fact. Settings; Factory Settings - Zte A39 User Manual

Data: Only restrict data.
Fax: Only restrict faxes.
Messages: Only restrict short messages.
All Except Messges: Restrict other services except short messages.
When you have set types of restriction services, the following can be chosen:
On: The restriction is functional.
Off: Delete the restriction.
Status: Query if the restriction is set.
Cancel All: Select Cancel All to cancel all set call restrictions.
Note: You need to input network password to set or cancel network restrictions.
Three consecutive times of wrong network password inputting will lock the call
restrictions service. Please contact network service provider to unlock it.
4.5.7 Factory Settings
In this menu, you can select to restore the related settings of the phone to factory
settings.
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