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Misc.setting：Setting the lightness of the background light
of LCD.
17.3 Network settings
Setting to choose the network by hands or automatically.
17.4 Security settings
SIM card security ：This function can open or close the
password lock. PIN number need to be input to power on the phone
after it being locked. Remarks: SIM card would be locked after
3 times mistaking the PIN number, and then PUK number is
necessary to unlock it.
Phone security：Open this function, when boot you need to
input password, the default password is 1234.
Auto keypad lock: Setting the waiting time of auto keypad lock.
The keypad will be locked automatically after the set time has
passed in the standby interface without any operation.
certificate manager: You can view the mobile phone of the
relevant certificate.
17.5 Connectivity
Bluetooth:1. Power: Setting the power of Bluetooth.
2. Visibility: Setting the visibility of
Bluetooth. When it’s off, other phones can’t search this
phone though it has opened Bluetooth.
