User manual

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7.1.5. Carrier’s Call Settings
realme smartphone includes several calling features such as Call Forwarding,
Call Waiting, Voicemail, and more.
Set up calling features. Go to [Settings] > [System Apps] > [Call] > [Carrier’s
Call Settings].

Voicemail: When you're away or can't get to the phone, your Voicemail
does the answering for you. Callers can leave recorded audio messages
to you, and you can view, listen to, and manage the messages.

Fixed Dialing Numbers: Add numbers to the FDN list, and when activated,
FDN restricts outgoing calls to only those numbers listed, or to numbers
with certain prefixes.