Verykool R13 - Manual (Page 27)

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Note:
PIN code is the operating password and
relative with the SIM card. The SIM card will be
locked, if the PIN code is wrong for 3
consecutive times. At this time, you need the
PUK code to unlock the SIM card. The PUK
code may be provided for you together with
the PIN code and the SIM card. If not, please
contact your network provider.
Fixed dial: after the function is activated, the
mobile phone is only allowed to be used to dial the
telephone numbers existing in the list. To turn on
the function, you need to input
your PIN2 code.
Please consult your network service provider for
specific situations.
Note:
When the Fixed dial function is active, the
function of SIM card will be restricted, such as
dial call, send SMS, and send MMS and so on.
Barred dial: this function needs to be supported
by SIM card. Please consult your network service
provider for specific situations.
Change password: you can change the
password of SIM1/SIM2 PIN and SIM1/SIM2 PIN2
through the system prompts.
4.7.5.2 Phone lock
This function is to lock the phone and prevent
other people from using the mobile phone without
permission (default password is 0000). After
enable the phone lock, you must input the correct
password every time powering on the mobile
phone, unless the mobile phone cannot be used
normally.
4.7.5.3 Auto keypad lock
After this function is activated, when the phone is in
standby status and without any operation, the keypad