Skype is a network-intensive program. Although the basic version is completely free, an Internet service (preferably a high-speed network connection) is required to use the program. In fact, with the advancements in the latest versions, a fast broadband Internet connection is necessary to decrease the chances of choppy playbacks and stalling video calls. The amount of bandwidth required to use the program also varies depending on the type of calls you plan to make and the features you intend to use. HD video calling and group videos require the most bandwidth; therefore, although purchasing one can be expensive, a fast network connection is recommended.