BenQ M315 - Manual (Page 104)

92 Menus
Phone Lock
Once the phone lock is activated, you will be required to enter the
phone code when the phone is turned on. You must enter the
correct code to unlock it (the default phone code is 1234). When
the phone is locked, you will only be able to make emergency calls.
SIM Lock
When activating the SIM Lock, you must enter the SIM Lock
password (the default SIM Lock password is 1234). The password
must be between 4 and 8 digits. Your phone allows you to use three
different SIM cards, and you are required to enter the SIM card
password if the card you use is different than the first three.
Screen Lock
Used to create a security screensaver. When you have not
performed any tasks with the phone for a set period of time, the
phone will automatically activate the screensaver.
Power Saving Mode
After you activate the power saving mode, keypad and display
backlighting will be turned off, in order to conserve power.
Language
You can select the language that the phone will use to display
information.
Input
You can set the default input mode that will be automatically activated
whenever you open the editing window for entering information into a
message, the Phone Book, and so forth.