A new way of making calls directly between mobile phones, for free, is being trialled by a Swedish company TerraNet.
And TerraNet phones currently only work with a special handset - although Mr Carlius said he hopes that it will eventually be a feature available on all phones, like Bluetooth.
He said that were this to happen, it could potentially spell the end for the current Global System for Mobile (GSM) communications model. About 70% of all mobile phones use this technology.
Mr Carlius said that mobile phone manufacturer Ericsson had invested around £3m in TerraNet.
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TerraNet AB
