"Imagine VoIP being a mobile service. Everyone has a cellular phone that is Wi-Fi enabled. At home we place a voice call over our DSL or cable broadband connection. We walk outside and the call automatically transfers to the cellular network without interruption. The call is billed based on minutes, just like a regular cellular call. One phone, one bill, two networks. All completely transparent to us. Who needs free voice calls when we love using our mobile phones so much?
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