voicemail question

I'm new to a cell-plan and have the Nation 900 Rollover & Unlimited
Night/Weekend & Unlimited Mobile-To-Mobile Minutes plan. I'm curious as to
how one is billed for voicemail left during "peak" periods (not night /
weekend) - if someone leaves voice mail, do the minutes count? Or, is the
only charge when I use the cell-phone to retrieve voice-mail? What about if
I use a land-line to listen to the voice-mail?

Any help would be appreciated.

Thanks,

CS.


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