You may be able to use your service wherever you travel as long as you have a broadband Internet connection available. Comcast, which launched its service more slowly than most of its cable rivals, posted a 73% jump in users. This technology converts the voice signal from your telephone into a digital signal that travels over the Internet. Vonage remained the industry leader with 1.8 million subscriber lines as of 2006.

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Get more features, pay less and call overseas - yahoo voip is really a no brainer

With yahoo voip you will be able to transfer you old telephone number to your new service provider. When you pick up the phone with yahoo voip and dial a phone number the phone adapter (black box) converts your voice into data and sends the data through the Internet in a similar manner to an email message. US subscribers to Internet-based telephone services grew 21% to 6.9 million in the second quarter of 2006. Some estimates have suggested that worldwide revenue of this new technology will hit the $96 billion mark by 2011. Be aware that some services don't work during power outages and the service provider may not offer backup power.

Get a phone number in any area code

With normal internet protocols, you can have a network consisting of many routers (20 - 30 or more) which can result in a very high round trip time. Most providers require you to have a custom telephone adapter that is pre-configured for their network so providing your own may not be an option. You can have as many lines you want and each additional line is billed at the same rate as a single line. Virtual numbers are normally an additional cost but can start out at only $4.99 per month and they can only be used for incoming calls.