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About VoIP Pre-Paid Phone CardsVoIP has become an important technology for phone services to travelers, migrant workers and ex-pats, who either, due to not having a fixed or mobile phone or high overseas roaming charges, choose instead to use VoIP services to make their phone calls. Pre-paid phone cards can be used either from a normal phone or from Internet cafes that have phone services. Developing countries and areas with high tourist or immigrant communities generally have a higher uptake. VoIMVoice over Instant Messenger, like popular Skype, Voice over MSN, Yahoo, QQ in China and Google Talk. VoIM is one kind of general VoIP that was based on an IM. VoIP, specifically, usually is referred as traditional SIP or H.323 IP phone, as opposed to VoIM as newly emerged Skype-like services/phones.
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