With MTV mobile WhatsApp pre, I get 30 days or up to 100MB free WhatsApp Messaging with a charge of min CHF 10. Can I use this for WhatsApp VoIP calling?
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No, WhatsApp data volume can only be used in Switzerland and only for text, picture, or video messaging. Data used with WhatsApp VoIP calling is counted as normal data and therefore is not part of the MTV Mobile WhatsApp offer.