Once hooked up to a phone and a Windows PC or Intel-based Macintosh, users can make low-fee calls to any landline or cell phone within the US, Canada, Puerto Rico or the Virgin Islands. Though VoIP isn’t new, critics hail the MagicJack for offering lower fees, especially considering that unlike its competitors, minutes are unlimited and both wired/wireless phones can be accessed. It also supports voicemail, which is immediately delivered via email upon being received. As for international calls, users merely purchase low-free pre-pay credits.