Nokia 309 - Manual (Page 35)

Prevent making or receiving calls
Keep your phone bill under control by preventing certain types of
calls. You can prevent, for example, incoming calls while you're
abroad. Call barring is a network service.
1. Select settings.
2. Select security > call barring service and an option.
3. Type in the barring password you have received from your service
provider.
Tip: To check how long your calls have been, how much data you've
used, or how many text messages you've sent, select counters. You
can set the counters to be cleared automatically, for example, each
month.
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