Avanti Call Charges All calls by the second unless otherwise stated. All calls are rounded up to the nearest second unless otherwise stated. All call charges are shown inclusive of VAT at 17.5% All charges shown are exclusive of any charges made by your mobile operator for connecting you to the Avanti platform. Click the links below to see the current rates for all destinations: International Landlines & Mobile Networks Avantimobile is currently only available to users in Great Britain. Example Rates Click below for full listings