The Air Is Free, And Sometimes So Are The Phone Calls That Borrow It

Some consumers are now having a taste of mobile phones that can make calls over the Internet. Companies like Vonage, Skype and T-Mobile are either promoting or selling these devices, which tap WiFi access points, particularly those installed in coffee shops, parks, businesses and homes, to enable calls.

Some home network users do not welcome the new trend. They believe VoIP users should not get the service for free when they pay for connection to their networks.

The devices come with some limitations. Because they use wireless networks, dropped calls are not unusual and battery life is short as WiFi is a power-hungry technology. But these allow for possibilities such as calls that can switch from cellular to WiFi networks and provide an alternative to traditional telecommunications networks.
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