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Gotcha and Thanks.
The next questions that come to mind then are (1) how the pricing of these cards is denominated -- i mean there is obviously a monetary value but how is number of minutes determined? does a, say, 10euro card give you 30 minutes of talk time?
(2) what happens when the card runs out of time, does your call get cut off?
(3) does each card had a discrete phone # so that one is able to accept calls?
(4) if so, are incoming calls charged differently?

Thanks in advance for any help!