Konka M520 User Manual page 60

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When Roaming: When this option is activated, you cannot receive
any incoming calls if you are out of reach of the network service.
Note on the above-mentioned five barring operations:
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Activate: Activate it after inputting the barring number.
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Deactivate: Cancel the barring function.
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Query Status: Inquire with the network about the current status of
the chosen barring option. The phone will make contact with the
network, and after a while, the network will respond and inform you
of the result.
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Cancel All:
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Cancel the call barring. The network barring password provided by
the network operator is required to cancel call barring.
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Change Barring Password: You can modify the barring password
with this function.
modifying.
Line Switching:
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Switch to Line 1 or Line 2, the default is Line 1.
Note: If you select Line 2, then making calls from Line 2
depends on the network operator.
Call Time Reminder:
The function prompts you to end the call to save the call cost.
prompt options are "Off", "Single" or "Periodic"; There will be no
prompts when the Call Time Reminder is set to OFF. You are required to
enter a specific time value in the range of 1 and 3,000 seconds When
set to "Single", the phone will automatically ring once. You are required
to select a numerical value between 30 and 60 seconds when setting
the prompt to "Periodic", and the phone will automatically ring once at
Enter the original barring password when
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