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Rebtel provides low-cost or free [5] international call services. Its service was first available as an intermediary service accessible by dialing a particular phone number but is now available through iOS and Android apps with a combined download count totaling over 10M users. [citation needed]
Jitsi (from Bulgarian: жици — "wires") is a collection of free and open-source multiplatform voice (VoIP), video conferencing and instant messaging applications for the Web platform, Windows, Linux, macOS, iOS and Android.
Ooma worked with West Valley City, Utah, in June 2014 to offer free telephone service to households through a fiber network. [23] In 2015, Ooma was named one of the fastest-growing private companies by the San Francisco Business Times and Silicon Valley Business Journal. [24] That same year, it was a gold winner of the Best of Biz Awards. [25]
Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.
Linphone (contraction of Linux phone) is a free voice over IP softphone, SIP client and service. It may be used for audio and video direct calls and calls through any VoIP softswitch or IP-PBX. Linphone also provides the possibility to exchange instant messages.
Web-based VoIP is the integration of voice over IP technologies into the facilities and methodologies of the World-Wide Web. It enables digital communication sessions between Web users or between users of traditional telecommunication services.
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In the United States, net2Phone began offering consumer VoIP service in 1995. [2] Usually, ITSPs negotiate agreements for route termination to various parts of the world from multiple VoIP providers. ITSP customers may be able to choose a VoIP provider for their VoIP calls.