According to the Beeb, TerraNet's technology allows calls to be made directly between phones without needing a base station.
TerraNet founder Anders Carlius said that he was on safari in Tanzania when he was miffed that he couldn't ring his mates riding in another jeep only a few metres away. We hope it was not to report that he was being eaten by a lion.
Carlius thought that if he could make phones talk to each other without base stations it would be jolly clever.
What he worked out was a system where the phones use P2P software that use other mobiles as relay points. Since each handset has an effective range of a kilometre there should be enough to get a decent network.
It is also free as in free beer.
When a TerraNet phone is switched on, it begins to look for other phones within range. If it finds them, it starts to connect and your father's brother is someone called Robert. µ
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