Voice Over IP Phone is more commonly referred to as VOIP phone service. It is a phone service delivered over a broadband internet connection. The most common residential type is probably a phone service delivered over high speed cable internet. You may have heard of well known providers like Vonage, but there are actually many voip phone providers from your local phone and cable companies to small companies that market over the internet.
Of course, cell phones are becoming another option. Many people have taken advantage of the various cell phone deals on smartphones offered by Verizon, T-Mobile, Sprint and AT&T and replaced their landlines with this modern technology.