haier C2001 - Manual (Page 26)

Change security code
Call restriction
Factory reset
Clear memory
Phone info
By default, the preset lock code is 0000.
This network service allows you restrict your calls.
Use this menu to reset the phone's settings you have changed.
Use this menu to clear all data (include Call history, Contacts (Phone), Contacts
(RUIM) or Clear all) that you have stored.
You can get S/W version, H/W version, and PRL version.
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