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Set call barring
Call barring is a network dependent feature
to restrict certain types of calling or prevent
others from making calls with your device.
1. According to the menu in a dial interface
Settings > Call settings > Voice Call > Call
barring > select SIM card.
2. Select a call type to restrict.
3. Enter a call barring password and select
OK. Your settings will be sent to the network.
Set call waiting
Call waiting is a network dependent feature
to alert you of an incoming call while you are
already on a call.
According to the menu in a dial interface
Settings > Call settings > Voice Call >
Additional settings > select SIM card. Select
the check box of Call waiting. Your settings
will be sent to the network.